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Senator Karen Mayne
Utah legislator profile

Years served in the Utah legislature

First session in legislature: 2008
Most recent year of service for which data are available: 2020
Total sessions served in Utah House as of 2020: 0
Total sessions served in Utah Senate as of 2020: 13

How to read the statistical profile

I present a variety of statistics about Sen. Karen Mayne's service in the Utah legislature. I highlight differences from chamber averages using little green and red arrows. The number of arrows is statistically determined. More arrows indicate a larger difference compared to the chamber average, in relation to how much diversity there is among legislators on this metric. If all legislators introduce exactly 5 bills, then a legislator who introduces 10 is very different; if legislators vary wildly in how many bills they introduce (but the average is still 5), then a legislator who introduces 10 bills may be less different from average. The standard deviation measures this diversity.

Sen. Mayne's statistical profile

2008200920102011201220132014201520162017201820192020
Service summary. Service prior to 2007 (if any) is not shown here. My database goes back only to 2007.
  Chamber SenateSenateSenateSenateSenateSenateSenateSenateSenateSenateSenateSenateSenate
  District S5S5S5S5S5S5S5S5S5S5S5S5S5
  Party DDDDDDDDDDDDD
Leadership NoneAsstWhipAsstWhipNoneNoneWhipWhipWhipWhipWhipWhipMinLdrMinLdr
Years in chamber 12345678910111213
Years comparison LowerLowerLowerLower==============HigherHigher
 
2008200920102011201220132014201520162017201820192020
Bills sponsored (learn more) Bills written and promoted by the legislator in his/her own chamber.
Introduced by Mayne 2741010911121822171617
Chamber average 9.89.08.910.69.810.810.611.410.110.69.610.29.7
Difference -7.8-2.0-4.9-0.6+0.2-1.8+0.4+0.6+7.9+11.4+7.4+5.8+7.3
Comparison LowerLowerLowerLowerLower==========HigherHigherHigherHigherHigherHigherHigherHigher
 
2008200920102011201220132014201520162017201820192020
Bill passage rate (learn more). What percent of Sen. Mayne's sponsored bills pass and are officially "enrolled"? (I ignore whether the governor signed or vetoted the bill.)
Bills introduced 2741010911121822171617
Bills passed 254886991418151210
Passage rate 100.0%71.4%100.0%80.0%80.0%66.7%81.8%75.0%77.8%81.8%88.2%75.0%58.8%
Chamber average 68.0%62.8%68.6%70.2%71.7%65.4%69.7%68.2%67.6%73.7%83.3%78.4%70.5%
Difference +32.0+8.6+31.4+9.8+8.3+1.3+12.1+6.8+10.2+8.1+4.9-3.4-11.7
Comparison HigherHigher==HigherHigherHigherHigher==Higher==Higher======Lower
 
2008200920102011201220132014201520162017201820192020
Bills floor sponsored. A "floor sponsor" is like a secondary sponsor of a bill. After a bill passes the sponsor's chamber, its sponsor needs to find a "floor sponsor" in the other chamber to usher it through the other chamber.
Total floor sponsored 45989547335153
Chamber average 11.511.111.011.411.811.111.512.312.813.414.213.613.3
Difference -7.5-6.1-2.0-3.4-2.8-6.1-7.5-5.3-9.8-10.4-9.2+1.4-10.3
Comparison LowerLower==Lower==LowerLowerLowerLowerLowerLower==LowerLower
 
2008200920102011201220132014201520162017201820192020
Missed votes (learn more). Usually missed votes occur because of competing obligations within the legislature, not because the legislator has left the capitol.
Missed votes 10394574354470513335402750
Total votes held 806807786940890940840951860913926975910
Absentee rate 1.2%4.8%5.7%7.9%3.9%4.7%8.3%5.4%3.8%3.8%4.3%2.8%5.5%
Chamber average 9.6%11.1%11.9%14.4%9.9%11.1%11.5%11.7%14.0%10.4%13.1%11.2%11.5%
Difference -8.4-6.3-6.2-6.5-6.0-6.4-3.2-6.3-10.2-6.6-8.8-8.4-6.0
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLower
 
2008200920102011201220132014201520162017201820192020
"Nay" votes (learn more). Most floor votes pass by overwhelming majorities, since unpopular bills get weeded out long before they reach the floor. As a result, "nay" votes are rare.
"Nay" votes 49394151513330514440354529
Total votes held 806807786940890940840951860913926975910
"Nay" rate 6.1%4.8%5.2%5.4%5.7%3.5%3.6%5.4%5.1%4.4%3.8%4.6%3.2%
Chamber average 4.1%4.1%4.6%3.4%4.8%3.7%3.6%4.8%3.7%2.8%3.2%2.7%2.5%
Difference +2.0+0.7+0.6+2.0+0.9-0.2+0.0+0.6+1.4+1.6+0.6+1.9+0.7
Comparison Higher====HigherHigher======HigherHigher==HigherHigherHigher
 
2008200920102011201220132014201520162017201820192020
Influence or "floor power" (learn more). What percentage of the time is the legislator on the winning side of a floor vote?
Floor power score 46.0%48.6%48.6%28.8%49.4%59.3%73.1%60.8%54.8%50.0%63.8%45.6%53.7%
Chamber average 69.1%69.6%70.2%71.7%70.5%68.6%67.3%68.5%66.8%67.9%68.2%70.2%70.9%
Difference -23.1-21.0-21.6-42.9-21.1-9.3+5.8-7.7-12.0-17.9-4.4-24.6-17.2
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerHigherLowerLowerLowerLowerLowerLowerLowerLowerLower
 
2008200920102011201220132014201520162017201820192020
Ideology score 1 (from interest group ratings). Half a dozen interest groups release ratings of each legislator after each legislative session. I rescale them all from 0 (most liberal) to 100 (most conservative) and average them together, resulting in the numbers reported here.
Average rating 29.853.046.243.042.439.0nanananananana
Chamber average 50.060.569.373.559.264.3nanananananana
Difference -20.2-7.5-23.1-30.5-16.8-25.3nanananananana
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowernanananananana
 
2008200920102011201220132014201520162017201820192020
Ideology score 2 (NOMINATE method) (learn more). Using a widely accepted scaling method, I calculate each legislator's ideology score (called a "NOMINATE" score) after each legislative session. I describe the method here. Scores have no intrinsic meaning; they are useful only for comparing two legislators. A legislator with a higher score is more to the right ideologically of a legislator with a lower scale. In most years, a conservative Republican will have a score above 0; a score close to 100 is extreme.
NOMINATE score -90.6-19.2-67.7-37.1-53.2-65.3-59.6-55.5-63.1-85.6-85.3-76.6-84.0
Chamber average 5.536.628.044.032.124.932.626.235.725.423.741.634.7
Difference -96.1-55.8-95.7-81.1-85.3-90.2-92.2-81.7-98.8-111.0-109.0-118.2-118.7
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLower
 
2008200920102011201220132014201520162017201820192020
Party support score (overall) (learn more). How consistently does Sen. Mayne support his/her party? That is, what percentage of the time does the legislator vote with the majority of the other members of his/her party? Scores are usually easily above 90%.
Score (overall) 98.2%97.9%98.8%98.0%98.0%99.0%98.8%98.1%99.0%98.4%98.2%99.5%99.3%
Chamber average 97.1%97.2%97.1%97.8%96.5%97.0%96.7%95.9%97.1%97.8%97.3%98.1%98.2%
Difference +1.1+0.7+1.7+0.2+1.5+2.0+2.1+2.2+1.9+0.6+0.9+1.4+1.1
Comparison HigherHigherHigherHigher==HigherHigherHigherHigherHigherHigherHigherHigherHigherHigherHigherHigher
 
2008200920102011201220132014201520162017201820192020
Party support score (party-line only) (learn more). This is the same as the "raw" party support score, but we look only at party-line votes when calculating this. A "party-line" vote occurs when the majority of Democrats votes against the majority of Republicans. Although party-line votes are rare, looking at the legislator's party support score in this setting can be revealing.
Score (party-line only) 87.8%75.0%91.2%76.8%78.1%85.7%80.0%79.1%86.5%75.5%72.9%93.2%87.9%
Chamber average 84.8%89.5%88.5%91.2%88.0%85.0%84.1%82.5%87.1%86.4%85.4%91.8%90.9%
Difference +3.0-14.5+2.7-14.4-9.9+0.7-4.1-3.4-0.6-10.9-12.5+1.4-3.0
Comparison HigherLowerLowerHigherLowerLowerLowerLower==Lower====LowerLowerLowerLower==Lower

Votes on Sen. Mayne's bills

Many votes have been held on bills sponsored by Sen. Mayne. In the interest of space, I display only the most and least divisive votes held on Sen. Mayne's bills.

Sen. Mayne's most divisive bills

Listed below are the 10 votes on bills sponsored by Sen. Mayne that had the closest vote margin (as a percent of the total votes cast). When there are ties, I list the most recent bills first.

Year Sponsor Bill Ayes Nays Margin
(as % of total votes)
Type of vote
2020 Mayne SB0198 12 15 11.1% Senate/ failed
2015 Mayne SB0127S01 15 12 11.1% Senate/ passed 2nd reading
2013 Mayne SB0118 14 11 12.0% Senate/ failed
2019 Mayne SB0043S02 41 32 12.3% House/ passed 3rd reading
2010 Mayne SB0013 40 31 12.7% House/ passed 3rd reading
2020 Mayne SB0213S01 42 32 13.5% House/ passed 3rd reading
2018 Mayne SB0030S01 39 29 14.7% House/ passed 3rd reading
2010 Mayne SB0012 15 11 15.4% Senate/ concurs with House amendment
2017 Mayne SB0102 41 27 20.6% House/ passed 3rd reading
2020 Mayne SB0198 17 11 21.4% Senate/ passed 2nd reading

Sen. Mayne's least divisive bills

Listed below are the 10 votes on bills sponsored by Sen. Mayne that had the widest vote margin (as a percent of the total votes cast). When there are ties, I display the most recent bills first.

Year Sponsor Bill Ayes Nays Margin
(as % of total votes)
Type of vote
2020 Mayne SB0214S01 22 0 100.0% Senate/ concurs with House amendment
2020 Mayne SB0214S01 27 0 100.0% Senate/ passed 2nd reading
2020 Mayne SB0213S01 28 0 100.0% Senate/ passed 2nd & 3rd readings/ suspension
2020 Mayne SB0197S01 71 0 100.0% House/ passed 3rd reading
2020 Mayne SB0197S01 25 0 100.0% Senate/ passed 3rd reading
2020 Mayne SB0197S01 28 0 100.0% Senate/ passed 2nd reading
2020 Mayne SB0155S03 64 0 100.0% House/ passed 3rd reading
2020 Mayne SB0155S03 28 0 100.0% Senate/ passed 3rd reading
2020 Mayne SB0155S03 27 0 100.0% Senate/ passed 2nd reading
2020 Mayne SB0153 26 0 100.0% Senate/ concurs with House amendment