WASHINGTON (Reuters) -Republican U.S. Senate candidate Herschel Walker, who has said he opposes abortion with no exceptions, has denied a media report that he paid for a girlfriend’s abortion in 2009. Walker, who aims to unseat Democratic Senator Raphael Warnock in Georgia, was responding to a Monday report by The Daily Beast that said the candidate’s then-girlfriend provided a receipt, a copy of the check and a get-well card given to her by the former football star endorsed by former President Donald Trump. “This is a flat-out lie – and I deny this in the strongest possible terms,” Walker, 60…