caucuses, again losing to Trump. Trump called Rubio's remarks at the February 25 debate "robotic" due to Rubio's repeated use of the same talking points; Rubio was later followed by hecklers who were dressed as robots. At another Republican debate on February 25, Rubio repeatedly criticized frontrunner candidate Donald Trump. It was described by CNN as a "turning point in style" as Rubio had previously largely ignored Trump during his campaign, and this deviated from Rubio's signature "optimistic campaign message". The next day Rubio continued turning Trump's attacks against him, even ridiculing Trump's physical appearance. On March 1, called 'Super Tuesday' with eleven Republican contests on that day, Rubio's sole victory was in Minnesota, the first state he had won since voting began a month prior. Rubio went on to win further contests in Puerto Rico on March6 and the District of Columbia on March 12, but lost eight other contests from March5 to 8. Around that time, Rubio revealed he was not "entirely proud" of his personal attacks on Trump. On March 15, Rubio suspended his campaign after placing second in his own home state of Florida. Hours earlier, Rubio had expressed expectations for a Florida win, and said he would continue to campaign (in Utah) "irrespective of" that night's results. The result was that Rubio won 27.0% of the Florida vote, while Trump won 45.7% and all of Florida's delegates. The conclusion of the six March 15 contests (out of which Rubio won none) left Rubio with 169 delegates on the race to reach 1237, but Ted Cruz already had 411 and Trump 673. On March 17, Rubio ruled out runs for the vice-presidency, governorship of Florida and even reelection for his senate seat. He said only that he would be a "private citizen" by January 2017, leading to some media speculation of the termination of his political career. After candidacy On April 12, during an interview with Mark Levin, Rubio expressed his wishes that Republicans would nominate a conservative candidate, name-dropping Cruz. This was interpreted as an endorsement of Cruz, though Rubio clarified the following day that he had only been answering a question. Rubio would later explain his decision to not endorse Cruz being due to his belief that the endorsement would not significantly benefit him and a desire to let the election cycle play out. On April 22, Rubio said he was not interested in