Marco Rubio and Jeb Bush Are the Ultimate Frenemies

During the GOP debate tonight in Boulder, Colo., former BFFs Senator Marco Rubio and Governor Jeb Bush proved to have a strained relationship now that they're on the same stage.

Rubio and Bush may be bashing each other now, but only a few years ago they were close friends. According to the Washington Post, when Rubio was elected to the Senate in 2010, Bush acted as his mentor. They shared an admiring teacher-student relationship. Jeb Bush had even once said, “Marco Rubio makes me cry for joy.” Rubio returned that feeling later that year by saying that he would never challenge Jeb Bush if he ran for Florida Senate.

That feeling changed completely tonight. After Senator Rubio answered a question concerning running for President while being a Senator. Governor Bush challenged his former protégé for not working enough.

“Marco, when you signed up for [Senate] it was a six-year term. You should show up to work," he said. "Just show up or resign."

The two politicians continued battling throughout the question. These former friends are definitely going to have a lot of making up to do after the election.