From the National Journal: (full story here):

The Senate Conservatives Fund, the former political action committee of Sen. Jim DeMint, R-S.C., turned Super PAC, may help embattled Rep. Todd Akin, R-Mo., raise money for his race against Sen. Claire McCaskill, D-Mo., after imposing one condition: Akin will support an earmark ban the group backs, according GOP aides involved in the conversations.

"He has agreed to their earmark ban," said Rick Tyler, a senior aide to the Akin campaign who long worked for former House Speaker Newt Gingrich.

That's a shift for a lawmaker who has defended the right of legislators to earmark appropriations on the grounds the Constitution gives Congress the power of the purse...

...McCaskill spokesperson Caitlin Legacki on Friday said Akin's apparent shift contradicts his claims to be a principled candidate. "He's willing to abandon his long-standing beliefs just for money," Legacki said.