Trump will not commit to accepting election result, shaking U.S. election campaign

By Steve Holland and Emily Stephenson LAS VEGAS (Reuters) - Republican presidential candidate Donald Trump would not commit on Wednesday to accepting the outcome of the Nov. 8 U.S. election if he loses, challenging a cornerstone of American democracy. Trump's refusal, which his Democratic rival Hillary Clinton called "horrifying," was the standout remark of their third and final debate. It ratcheted up claims that Trump has made for weeks and has intensified in recent days that the election is b