The Trump Effect on the Future of the Senate

Thirty-four seats in the Senate are up for grabs in November – 24 of them now held by Republicans. Democrats need a net gain of just five to regain control of the chamber. What are their chances? Guest host Todd Purdum explores Donald Trump's impact on hotly contested Senate races around the country, in states from Illinois and Wisconsin, to Pennsylvania and New Hampshire.

Later on the program, the secret sauce that makes a Broadway musical.

Photo: Republican Rob Portman of Ohio is one of those whose Senate seat is at risk (Gage Skidmore)