From Congressional Quarterly today:

And there have been hints of softness on the right flank of his coalition, as a number of uncommitted conservatives continue to voice indecision.
Many of those publicly supporting Blunt are RSC members, who signed on before Shadegg jumped into the race Jan. 13.
In recent days, Blunt’s office has removed the names of two leading conservatives -Joe Pitts of Pennsylvania and Dana Rohrabacher of California – from Blunt’s list of public supporters
“A lot of people committed early who wish they hadn’t,” said Rep. Mark Souder, R-Ind., an RSC member who came out in support of Shadegg this week.
Because the contest for majority leader will be decided by secret ballot Feb. 2, there is no guarantee that even those who have made public commitments to one candidate or another will follow through on them. Leadership races are notoriously hard to handicap for just that reason.
Souder said that Pence and other RSC members had hoped that they could serve as swing votes to wring policy concessions from either Blunt or Boehner, particularly on lobbying rules and legislative procedures that would address the alleged abuses that are surfacing in the scandal surrounding lobbyist Jack Abramoff. But Blunt made that impractical as he came close to locking up a majority, he said.
Souder said that Shadegg had been pushing Republican leaders to enact changes in gift and travel rules, and in how legislation is written, long before Abramoff and an associate, Michael Scanlon, pled guilty to fraud and conspiracy charges.