ATLANTA (AP) - Mitt Romney still can't seem to win over the bulk of conservatives who make up the bedrock of the Republican Party.

His stunning trio of defeats this week laid bare the difficulties that still could undercut his path to the party's nomination - and hamper him in the general election to follow if he does win the GOP prize..

Not that he would acknowledge as much on Wednesday.

Visiting Atlanta, he dismissed the notion that he's got a problem with the party's core supporters.

His next test comes Feb. 28 when Arizona and Michigan vote.