Donald Trump and Marco Rubio just can't help themselves, and their political punch-for-punch keeps getting weirder. The Republican presidential contenders spent the day Friday slinging mud at each other across the state of Texas. First, Rubio slammed the billionaire businessman for a series of misspelled tweets.But Trump has his own bizarre take-down up his sleeve. At a campaign rally in Fort Worth, Texas, later in the day, Trump reached behind his podium and pulled out a water bottle and held it up to a cheering crowd."It's Rubio!" he exclaimed before sloshing water all over the stage, and making a mocking face to the crowd.