One of the most competitive midterm Senate races this year will be in a state Democrats have spent millions trying to flip in the past. That state is Maine, where Democrats are looking to unseat incumbent Republican Senator Susan Collins, who is running for a sixth term. Our next guest, Governor Janet Mills, is one of the Democrats running in the primary scheduled for June 9th.She will face off against several opponents, including progressive candidate Graham Plattner, who just this week received a key endo ...