PURCELLVILLE, Va. — Mike Pence slammed Hillary Clinton’s denouncement of Donald Trump’s "alt-right" supporters, calling it an attack on “millions of hard working Americans who long for a better future in this country" at a rally here Saturday.It was Pence’s first sustained response to the Democratic nominee's Reno speech attacking his Republican running mate, as the presidential race saw new levels of insult-slinging in recent days.“It’s really remarkable isn’t it?