Alabama voters are heading to the polls on Tuesday to elect a new senator, choosing between Republican candidate Judge Roy Moore, Democratic candidate Doug Jones and a handful of write-in candidates. Moore has been under scrutiny the last few weeks following multiple accusations of sexual misconduct against teenagers while he was in his 30’s. In response, some Senate Republicans including Majority Leader Mitch McConnell have suggested Moore could face an investigation should he win the seat. While some Republicans say the decision is best left to Alabamians, constitutional scholar Ronald Krotoszynski says the Republican caucus as a whole could face repercussions if they seat Moore unchallenged. He joins Soledad O’Brien to discuss the Senate’s code of ethics, the precedent set by Sen. Al Franken’s resignation and the constitutional process of expelling a sitting senator.

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