Unconventional convention a crucial moment for Biden

It may be unfashionable to say, but national party conventions are important -- even when the parties can't convene.

They are among the few nights on the election calendar when a candidate and campaign have the chance to deliver an unfiltered message directly to an audience of tens of millions of Americans.
Joe Biden enters his convention with an average polling lead of 9 points, the strongest position of any challenger to an incumbent president in recent history.