Biden facing enthusiasm gap even as polls show him topping Trump

As the race for the White House transitions from a primary battle between former Vice President Joe Biden and Sen. Bernie Sanders, I-Vt., to a likely general election showdown between Biden and President Trump, two new national polls show the former vice president holding the early edge over the GOP incumbent. But in a potentially troubling sign for Biden, one of the two surveys points to a large enthusiasm gap that favors Trump.-- More...