Menu Adam R Brown

Return to the Guide to the Utah Legislature.

Representative Michael J. Petersen
Utah legislator profile

Years served in the Utah legislature

First session in legislature: 2021
Most recent year of service for which data are available: 2022
Total sessions served in Utah House as of 2022: 2
Total sessions served in Utah Senate as of 2022: 0

How to read the statistical profile

I present a variety of statistics about Rep. Michael J. Petersen'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.

Rep. Petersen's statistical profile

Service summary. Service prior to 2007 (if any) is not shown here. My database goes back only to 2007.
  Chamber HouseHouse
  District H3H3
  Party RR
Leadership NoneNone
Years in chamber 12
Years comparison LowerLower
Bills sponsored (learn more) Bills written and promoted by the legislator in his/her own chamber.
Introduced by Petersen 35
Chamber average 6.67.1
Difference -3.6-2.1
Comparison LowerLowerLower
Bill passage rate (learn more). What percent of Rep. Petersen's sponsored bills pass and are officially "enrolled"? (I ignore whether the governor signed or vetoted the bill.)
Bills introduced 35
Bills passed 13
Passage rate 33%60%
Chamber average 60%58%
Difference -26.8+1.8
Comparison Lower==
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 10
Chamber average 3.13.0
Difference -2.1-3.0
Comparison LowerLower
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 512
Total votes held 666711
Absentee rate 0.8%1.7%
Chamber average 6.1%5.7%
Difference -5.3-4.0
Comparison LowerLower
"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 10882
Total votes held 666711
"Nay" rate 16%12%
Chamber average 7.7%6.5%
Difference +8.3+5.5
Comparison HigherHigherHigherHigherHigherHigher
Winning side rate (learn more). What percentage of the time (excluding near-unanimous votes) is the legislator on the winning side of a floor vote?
Winning side rate 68%61%
Chamber average 66%67%
Difference +2.2-5.9
Comparison ==Lower
Ideology score (NOMINATE method) (learn more). Using W-NOMINATE algorithm developed by Congressional scholars, I calculate each legislator's relative ideology after each General Session. I describe the method here. Scores have no intrinsic meaning. They are only relative: A legislator with a higher score is to the right ideologically of a legislator with a lower scale. Scores may be compared only within a single chamber and a single year. In most years, a conservative Republican will have a score above 0; a score close to 100 is extreme.
Contact me for scores. They get misinterpreted often enough that I now provide them only to political scientists.
Party support score (overall) (learn more). How consistently does Rep. Petersen 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) 87%92%
Chamber average 94%95%
Difference -6.4-3.8
Comparison LowerLowerLower
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%93%
Chamber average 85%84%
Difference +12+9.0
Comparison HigherHigher

Votes on Rep. Petersen's bills

Only 5 bills sponsored by Rep. Petersen have come to a vote. Listed below are all votes held on bills that Rep. Petersen sponsored. The votes are sorted by vote margin, with the most divisive votes listed first.

Year Sponsor Bill Ayes Nays Margin
(as % of total votes)
Type of vote
2022 Petersen HB0085 34 41 9.3% House/ failed
2022 Petersen HB0085 32 42 14% House/ substitute adoption failed from # 0 to # 1
2022 Petersen HB0357 27 2 86% Senate/ passed 2nd & 3rd readings/ suspension
2022 Petersen HB0411S03 69 1 97% House/ passed 3rd reading
2021 Petersen HB0293S01 70 1 97% House/ passed 3rd reading
2022 Petersen HB0411S03 70 0 100% House/ concurs with Senate amendment
2022 Petersen HB0411S03 28 0 100% Senate/ passed 2nd & 3rd readings/ suspension
2022 Petersen HB0357 74 0 100% House/ concurs with Senate amendment
2022 Petersen HB0357 66 0 100% House/ passed 3rd reading
2022 Petersen HB0067S01 26 0 100% Senate/ passed 3rd reading