The top Senate GOP super PAC is laying down a massive $342 million ad buy in an aggressive push to help Republicans maintain control of the Senate, reserving airtime in eight battleground states in this year’s midterm elections.

The Senate Leadership Fund, a group with close ties to Majority Leader John Thune, announced the plan Monday. The group’s initial ad reservation stretches deep into Republican territory.

The super PAC committed $71 million in North Carolina, widely viewed as one of the most competitive seats of the year, in addition to the $42 million it previously allocated in January to help reelect Sen. Susan Collins in Maine.

The lis…

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