Senate Democrats’ top super PAC announced Tuesday it is launching a new ad campaign in the Mississippi Senate race, as Democrats seek inroads in Republican-leaning states to try to flip the Senate majority. Senate Majority PAC announced a $1.2 million ad campaign in the state through Election Day, beginning with a 30-second spot that boosts prosecutor Scott Colom as a Democrat who will “fight corruption in both parties” and casts GOP Sen. Cindy Hyde-Smith as a “do-nothing” incumbent. “Senate Majority PAC has been watching this race closely, and it is clear Colom is running a competitive race that has put...