WASHINGTON (Reuters) - Former U.S. Republican presidential candidate Carly Fiorina on Wednesday threw her support behind Ted Cruz, saying the U.S. senator from Texas was the only candidate left who could topple front-runner Donald Trump and take the White House from Democrats. “The only guy who can beat Donald Trump is Ted Cruz,” Fiorina said at a rally for Cruz in Miami.  (Reporting by Washington newsroom; Editing by Mohammad Zargham) This article was funded in part by SAP. It was independently created by the Reuters editorial staff. SAP had no editorial involvement in its creation or production.