Chris Hayes: If Republicans win, Trump will be the ‘shadow Speaker of the House’

Guests: Robert Draper, Cornell Belcher, Maria Teresa Kumar, Tom Periello, John Legend Tonight: The return of chaos in American government that's on the ballot in four days. Then, Cornell Belcher on reading the wild variations in last minute election polls. Plus, the Republican candidate who wants "a community-level review process"to decide whether rape victims can get abortions. And direct from the campaign trail with Barack Obama—the one and only John Legend on his midterm message to voters.