CNN’s Peter Hamby reports Sen. Rand Paul is set to endorse Mark Sanford in the special election for South Carolina’s vacant House seat.

The move would make Paul the first 2016er to venture into the race in which the National Republican Congressional Committee has already abandoned.

From Hamby:

He’s also set to endorse Republican Mark Sanford in the special election in South Carolina’s 1st Congressional District, two sources familiar with the race said. The endorsement could come as soon as Tuesday.

 Paul’s political organization will donate money to the South Carolina Republican Party for its get-out-the-vote effort in Sanford’s race against Democrat Elizabeth Colbert-Busch, one source said. That election will be held on May 7.