Republicans can wave goodbye to control of the state Senate if Dean Skelos gets busted in a corruption scandal heading into a presidential-election year, sources said.

The GOP holds a razor-thin ­majority in the 63-member Senate, 32 to the Democrats’ 31.

Six Dems are renegades who ally themselves with the GOP caucus.

But corruption accusations don’t help the GOP cause in an already challenging political environment.

A huge Democratic turnout is expected in 2016 if Hillary Rodham Clinton is the Democratic presidential candidate, strategists said, which could impact races down the ballot.

Skelos faces a federal probe but has not been charged with wrongdoing.