Despite sharing some advisers and a state, Mitt Romney and Scott Brown probably won't be putting arms around each other this fall.
Brown probably will continue to play down his ties to his former governor and emphasize his own independent streak, particularly with recent polls showing Obama enjoying a double-digit over Romney in Massachusetts.
"Brown sees pretty clearly that there are no Romney coattails in Massachusetts for him to ride and, indeed, being close to Romney for his own re-election bid could be a liability," said Paul Watanabe, a political science professor at the University of Massachusetts.
The distance between the candidates is more than strategic. Romney and Brown have adopted competing views on several big issues, from a new nuclear weapons treaty with Russia to the fate of the U.S. Supreme Court's Roe v. Wade decision legalizing abortion.
Romney has said Roe v. Wade should be reversed. Brown says a woman should have the right to an abortion, although he opposes federal money for the procedure. Brown voted for the new START treaty with Russia, saying it was important for national security. Romney said the treaty was Obama's "worst foreign policy mistake."