Effort to replace Trump on ballot would face tremendous obstacles

By Joel Schectman and Ginger Gibson WASHINGTON (Reuters) - Some prominent Republicans are urging Donald Trump to quit as the party's presidential nominee after video surfaced of him making vulgar comments about women but any attempt to replace Trump on the ballot would face huge legal and logistical hurdles. The real estate magnate has insisted he would never give up the White House race and wrote on Twitter on Sunday that Republicans who are attacking him are "self-righteous hypocrites." With o