"Not only am I going to serve for six years — I've been honest with people [about] the things I want to achieve. Some may take longer than six years to achieve. And so that's what my focus is on, 100 percent,” Rubio said on Newsradio 970 WFLA, according to CNN.
Rubio said as much in a Monday night debate against challenger Rep. Patrick Murphy, where he said, ”If I wanted to run for something else, I wouldn't have run for Senate.” He also seemingly ruled out a 2020 presidential bid in a June appearance on "Face The Nation."
Then again, Rubio ruled out running for the Senate again before he began his bid for the presidency in 2015. Even after he announced the end of his presidential bid, in March, he said he would “be a private citizen in January” and would not seek re-election to the Senate.
I have only said like 10000 times I will be a private citizen in January.
— Marco Rubio (@marcorubio) May 17, 2016
Three months and one week later, he went back on that statement, saying that, if Donald Trump were elected president, "we will need Senators willing to encourage him in the right direction, and if necessary, stand up to him."