Ideology and Voting
According to The Washington Post, Pat Roberts was present for 88% of 484 votes in the 112th Congress. Not surprisingly (considering they are both republicans), Roberts and other Kansas Senator Jerry Moran vote together on almost all issues. I could only find two instances where they have cast opposite votes (although Senator Moran has missed quite a few votes this session).
Roberts' interest group scores are, for the most part, what would be expected. According to Project Vote Smart, he has scores of 100% from groups such as the National Right to Life Committee and a score of 0% from the NARAL Pro-Choice America. However, somewhat surprisingly, Roberts has a score of 11% from Planned Parenthood-Positions (February 26, 2013) and a score of 8% from Planned Parenthood-Positions (2012). Although this scores are still very low, it makes me wonder what he has done recently to make Planned Parenthood give him a marginally higher rating. I don't know if this change in his ratings has anything to do with the upcoming election, but it does seem interesting that Roberts had a solid 0% rating until the last 2 years. Roberts was the only Congressman from Kansas to get anything other than a 0% rating from Planned Parenthood.
Another surprising finding was the indecisiveness of most of Roberts scores. Although he did have some clear cut, either 100% or 0%, quite a few scores that were in between. Roberts almost had more indecisive scores than he did decisive ones. Even on some of his bigger issues such as education and agriculture, he did not have an overwhelming amount of clear-cut scores. These indecisive scores are surprising to me considering how closely he votes along party lines.
Roberts typically votes along party lines. I could not find any major votes that Roberts made that went against what would be expected. In fact, according to PoliGu.com, Roberts often votes along party lines more often than the average Republican in the Senate. In 2012, Roberts voted along party lines 90% of the time, which was a fairly low percentage for him when compared to other years. His lowest score since he has been in the senate was 86.2%, and his average overall since 1997 is 93.1%.
An interesting fact not directly related to voting: Roberts and Senator Tim Johnson introduced a bill to "ensure that hundreds of rural communities across the nation remain eligible for rural housing development programs administered by the USDA". The bill would grandfather the existing USDA rural housing areas until the 2020 census but would also raise the population cap from 25,000 to 35,000.
Sources:
http://votesmart.org/candidate/evaluations/26866/pat-roberts#.UXoDa-B3rRo
http://projects.washingtonpost.com/congress/members/R000307
http://www.thepoliticalguide.com/Profiles/Senate/Kansas/Pat_Roberts/VotingStatistics/
http://projects.washingtonpost.com/congress/113/senate/1/votes/103/
http://www.roberts.senate.gov/public/index.cfm?p=PressReleases&ContentRecord_id=8ae3a27d-9ca7-4884-bb57-317665636f17&ContentType_id=ae7a6475-a01f-4da5-aa94-0a98973de620&Group_id=d8ddb455-1e23-48dd-addd-949f9b6a4c1f
http://www.examiner.com/article/senators-johnson-and-roberts-introduce-rural-housing-bill