Romney vows to keep his campaign focused on defeating Obama Margin of Victory is closest ever for GOP presidential contest . Santorum 's campaign says he proved he 's the only conservative who can beat Romney McCain to endorse Romney , senior GOP official says . Paul says ` ` the idea of liberty is appealing to everybody '' Romney collects 30,015 votes , Santorum collects 30,007 .
Romney vows to keep his campaign focused on defeating Obama Margin of victory is closest ever for GOP presidential contest . Santorum 's campaign says he proved he 's the only conservative who can beat Romney McCain to endorse Romney , senior GOP source says . Paul says `` the message of liberty is appealing to everybody '' Romney gets 30,015 votes , Santorum collects 30,007 .