Toxic Tea?

Newly elected Florida senator Marco Rubio is being evasive on whether he's joining the new Senate Tea Party caucus. As a well polished latino Republican who just won election easily in a swing state, Rubio no doubt has aspirations to higher office (Vice President, President) and he may not want to put a black mark on his senate career with a direct connection to what is effectively the modern John Birch Society, would he?