Harris, Trump to debate Tuesday in pivotal moment of campaign

The stage is set for what could be the pivotal moment in the campaign leading up to the November 5 U.S. presidential election - Tuesday night's debate between Democratic Vice President Kamala Harris and Republican former President Donald Trump.

The two candidates have never met each other or even talked on the phone, but on Tuesday they will be standing a short distance from each other behind lecterns at the Nati