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Senator Jani Iwamoto
Utah legislator profile

Years served in the Utah legislature

First session in legislature: 2015
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: 6

How to read the statistical profile

I present a variety of statistics about Sen. Jani Iwamoto'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. Iwamoto's statistical profile

201520162017201820192020
Service summary. Service prior to 2007 (if any) is not shown here. My database goes back only to 2007.
  Chamber SenateSenateSenateSenateSenateSenate
  District S4S4S4S4S4S4
  Party DDDDDD
Leadership NoneNoneCaucusMgrCaucusMgrAsstWhipAsstWhip
Years in chamber 123456
Years comparison LowerLowerLowerLower====
 
201520162017201820192020
Bills sponsored (learn more) Bills written and promoted by the legislator in his/her own chamber.
Introduced by Iwamoto 279121215
Chamber average 11.410.110.69.610.29.7
Difference -9.4-3.1-1.6+2.4+1.8+5.3
Comparison LowerLowerLower==Higher==Higher
 
201520162017201820192020
Bill passage rate (learn more). What percent of Sen. Iwamoto's sponsored bills pass and are officially "enrolled"? (I ignore whether the governor signed or vetoted the bill.)
Bills introduced 279121215
Bills passed 15891112
Passage rate 50.0%71.4%88.9%75.0%91.7%80.0%
Chamber average 68.2%67.6%73.7%83.3%78.4%70.5%
Difference -18.2+3.8+15.2-8.3+13.3+9.5
Comparison Lower==HigherLowerHigherHigher
 
201520162017201820192020
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 6034311
Chamber average 12.312.813.414.213.613.3
Difference -6.3-12.8-10.4-10.2-10.6-2.3
Comparison LowerLowerLowerLowerLowerLowerLower==
 
201520162017201820192020
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 4439434683740
Total votes held 951860913926975910
Absentee rate 4.6%45.8%3.7%7.3%3.8%4.4%
Chamber average 11.7%14.0%10.4%13.1%11.2%11.5%
Difference -7.1+31.8-6.7-5.8-7.4-7.1
Comparison LowerHigherHigherHigherLowerLowerLowerLowerLower
 
201520162017201820192020
"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 792949425431
Total votes held 951860913926975910
"Nay" rate 8.3%3.4%5.4%4.5%5.5%3.4%
Chamber average 4.8%3.7%2.8%3.2%2.7%2.5%
Difference +3.5-0.3+2.6+1.3+2.8+0.9
Comparison HigherHigher==HigherHigherHigherHigherHigherHigher
 
201520162017201820192020
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 46.5%36.7%42.1%58.6%42.1%55.0%
Chamber average 68.5%66.8%67.9%68.2%70.2%70.9%
Difference -22.0-30.1-25.8-9.6-28.1-15.9
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLower
 
201520162017201820192020
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 nananananana
Chamber average nananananana
Difference nananananana
Comparison nananananana
 
201520162017201820192020
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 -82.0-99.1-95.5-86.8-99.7-85.7
Chamber average 26.235.725.423.741.634.7
Difference -108.2-134.8-120.9-110.5-141.3-120.4
Comparison LowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLowerLower
 
201520162017201820192020
Party support score (overall) (learn more). How consistently does Sen. Iwamoto 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) 98.1%99.4%98.6%98.7%99.2%99.5%
Chamber average 95.9%97.1%97.8%97.3%98.1%98.2%
Difference +2.2+2.3+0.8+1.4+1.1+1.3
Comparison HigherHigherHigherHigherHigherHigherHigherHigher
 
201520162017201820192020
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) 97.1%100.0%84.9%88.4%100.0%93.8%
Chamber average 82.5%87.1%86.4%85.4%91.8%90.9%
Difference +14.6+12.9-1.5+3.0+8.2+2.9
Comparison HigherHigherHigherHigher====HigherHigherHigher

Votes on Sen. Iwamoto's bills

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

Sen. Iwamoto's most divisive bills

Listed below are the 10 votes on bills sponsored by Sen. Iwamoto 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
2017 Iwamoto SB0088 12 13 4.0% Senate/ failed
2015 Iwamoto SB0049S01 17 10 25.9% Senate/ passed 3rd reading
2017 Iwamoto SB0088 47 27 27.0% House/ passed 3rd reading
2018 Iwamoto SB0057S01 43 24 28.4% House/ passed 3rd reading
2019 Iwamoto SB0088 47 24 32.4% House/ passed 3rd reading
2018 Iwamoto SB0057S01 20 6 53.8% Senate/ passed 3rd reading
2018 Iwamoto SB0095S01 20 5 60.0% Senate/ passed 2nd reading
2020 Iwamoto SB0048 21 5 61.5% Senate/ passed 2nd reading
2017 Iwamoto SJR008 57 13 62.9% House/ passed 3rd reading
2018 Iwamoto SB0113S03 22 3 76.0% Senate/ passed 2nd reading

Sen. Iwamoto's least divisive bills

Listed below are the 10 votes on bills sponsored by Sen. Iwamoto 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 Iwamoto SJR006S02 26 0 100.0% Senate/ concurs with House amendment
2020 Iwamoto SJR006S02 65 0 100.0% House/ passed 3rd reading
2020 Iwamoto SJR006S02 28 0 100.0% Senate/ passed 3rd reading
2020 Iwamoto SJR002 67 0 100.0% House/ passed 3rd reading
2020 Iwamoto SJR002 28 0 100.0% Senate/ passed 3rd reading
2020 Iwamoto SJR001 69 0 100.0% House/ passed 3rd reading
2020 Iwamoto SJR001 27 0 100.0% Senate/ passed 3rd reading
2020 Iwamoto SCR003S01 72 0 100.0% House/ passed 3rd reading
2020 Iwamoto SCR003S01 27 0 100.0% Senate/ passed 2nd & 3rd readings/ suspension
2020 Iwamoto SCR002 72 0 100.0% House/ passed 3rd reading