The bulk of the Republican base has come around to accepting that Mitt Romney will be their nominee. According to Pew Research 74% of Republicans and Republican leaning voters think he will definitely get the nomination.
In addition the poll found that a plurality of the GOP base now feels that continuing the primary is a bad thing.
At this point it is clear that Rick Santorum has over stayed his welcome. Very few Republicans think he has a chance of winning, and most think that by keeping the primary going he is hurting the party’s prospects.
During the primary Santorum did a great job raising his profile and increasing his potential as a spokesman for the conservative movement. But he is now starting to run the risk of undoing his brand, especially if he is seen as damaging the party by continuing a clearly doomed campaign.