Obama campaign: No surprise Romney is still standing and Santorum isn't

Messina then launched into the campaign's regular attacks on Romney: that he isn't a true conservative and that he has "promised to return to the same policies that created the economic crisis and has alienated women, middle-class families and Hispanic Americans." 

The statement echoes the lines of attack Obama's reelection campaign have been using against Romney, the only GOP hopeful it has been targeting, throughout the primary process. 

The president's campaign hopes to rally Hispanic and middle-class voters by portraying Romney as disinterested in their welfare. 

The campaign also hopes to capitalize on the recent skirmish over contraception, which Democrats have tried to paint as part of a Republican "war on women."