He should have disassociated himself from the remarks and then said he was leaving it up to Akin and the GOP in Missouri to decide how to move forward.
Even now, Romney and the RNC NEED to say they were offended by his remarks, but have listened to his apology, believe he's sincere and know that McCaskill is far worse for the state and will support anyone trying to defeat her. If they don't, they will be the ones ultimately responsible for losing the Senate race in Missouri. They will not give Akin a chance to recover in the polls if they let McCaskill outspend him 12 to 1.