CBS NEWS March 4, 2016 by JACQUELINE ALEMANY How Donald Trump Could Affect The GOP's Efforts To Hold The Senate Speaking on the floor of the U.S. Senate, Majority Leader Harry Reid previewed what's to come this November if Donald Trump wins the Republican presidential nomination. "Republicans are supporting a man who refused to denounce the KKK," Reid said Wednesday, tearing into the "Frankenstein Party" that could nominate Trump at this summer's Republican convention in Cleveland. "A man who continues to denigrate immigrants, Muslims and the disabled," Reid said. "Donald Trump is the standard-bearer for the Republican Party." Democrats up...