Senator Marco Rubio (R-FL) announced on April 13, 2015 that he was running for President. His tweet, sent out at 5:14 pm CST, during his speech the same day at Freedom Tower in Miami, Florida in which he outlined his motivation for a run:
“Just yesterday, a leader from yesterday began a campaign for president by promising to take us back to yesterday. Yesterday is over and we’re never going back.”
In announcing his intention to seek the presidency, Rubio joins fellow Senators Ted Cruz (R-TX) and Rand Paul (R-KY) as the only declared Republican candidates.