Menu Adam R Brown

Return to the Guide to the Utah Legislature.

Representative Aaron Tilton
Utah legislator profile

Years served in the Utah legislature

First session in legislature: 2005
Most recent year of service for which data are available: 2008
Total sessions served in Utah House as of 2008: 4
Total sessions served in Utah Senate as of 2008: 0

How to read the statistical profile

I present a variety of statistics about Rep. Aaron Tilton'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. Tilton'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 H65H65
  Party RR
Leadership NoneNone
Years in chamber 34
Years comparison LowerLower
Bills sponsored (learn more) Bills written and promoted by the legislator in his/her own chamber.
Introduced by Tilton 103
Chamber average 6.16.1
Difference +3.9-3.1
Comparison HigherLower
Bill passage rate (learn more). What percent of Rep. Tilton's sponsored bills pass and are officially "enrolled"? (I ignore whether the governor signed or vetoted the bill.)
Bills introduced 103
Bills passed 62
Passage rate 60%67%
Chamber average 51%53%
Difference +9.4+14
Comparison ==Higher
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 13
Chamber average 3.13.2
Difference -2.1-0.2
Comparison Lower==
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 12872
Total votes held 602616
Absentee rate 21%12%
Chamber average 8.3%8.3%
Difference +13+3.7
Comparison HigherHigherHigher
"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 4646
Total votes held 602616
"Nay" rate 7.6%7.5%
Chamber average 7.2%6.0%
Difference +0.4+1.5
Comparison ==Higher
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 67%67%
Chamber average 67%69%
Difference +0.7-2.2
Comparison ====
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. Tilton 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) 92%93%
Chamber average 95%95%
Difference -2.3-2.4
Comparison LowerLowerLowerLower
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) 95%93%
Chamber average 79%82%
Difference +16+11
Comparison HigherHigherHigher

Votes on Rep. Tilton's bills

Only 10 bills sponsored by Rep. Tilton have come to a vote. Listed below are all votes held on bills that Rep. Tilton 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
2007 Tilton HB0237S01 37 37 0.0% House/ failed
2007 Tilton HB0237S01 40 29 16% House/ passed 3rd reading
2007 Tilton HB0236S07 41 29 17% House/ concurs with Senate amendments
2008 Tilton HB0323S01 16 9 28% Senate/ pass 2nd
2007 Tilton HB0334S03 44 20 38% House/ passed 3rd reading
2007 Tilton HB0236S07 20 8 43% Senate/ pass 3rd
2007 Tilton HB0236S07 20 8 43% Senate/ pass 2nd
2007 Tilton HB0333 16 6 45% Senate/ pass 2nd
2008 Tilton HB0323S01 55 17 53% House/ passed 3rd reading
2008 Tilton HB0323S01 21 5 62% Senate/ pass 3rd