Senate Republicans on Wednesday were in intense discussions about canceling the August recess, a move that could cripple vulnerable Democrats running for re-election in red states.

With President Trump’s encouragement, Republicans are threatening to keep the Senate open for an extended summer session to process agenda items delayed by Democratic obstruction. But the political benefits of denying incumbent Democrats valuable time on the campaign trail is also factor in the Republicans’ deliberations, and why they appear more willing that usual to give up a treasured annual vacation.