A new NBC News poll of 1,000 registered voters gives Democrats a 52%-45% lead on the congressional ballot, with voters demanding change and 60% disapproving of President Donald Trump, a new high. Pollster Jeff Horwitt calls it the promise of two years ago versus the peril of two days from now, while Republican pollster Bill McInturff says Democrats control the issue agenda and midterms are about Trump and the economy.