Republican senators turning against their Senate colleagues in 2016

“Senators make uniquely dreadful candidates,” said Rich Galen, who served as a senior adviser to former Sen. Fred Thompson’s (R-Tenn.) 2008 presidential campaign.

“Senators spend their entire day debating if a semicolon should be a comma. Governors have to run very complex organizations, and they know how to do it,” he said.

Galen said of the three Republican senators angling for the White House, Cruz would have the toughest time broadening the party’s base.

“What you don’t need in the White House is somebody who is so horribly dogmatic,” he said.

If Paul decides to run for president in 2016, he is likely to spark strong opposition from the national security and big-business wings of the party.