Republican congressional candidate John Faso on Monday released an internal campaign poll showing him with a double-digit lead over Andrew Heaney in the GOP primary contest.

The poll from McLaughlin and Associates found Faso leading Heaney 51 percent to 32 percent, while 17 percent of voters were undecided.

The poll also found Faso, a former state Assembly minority leader, has a 46 percent favorable rating among Republican voters in 19th congressional district. Heaney’s favorable rating stands at 28 percent.

“John Faso has done a very good job defining his positive conservative message for the election,” the polling memo states. “While Andrew Heaney’s negative campaign has created a significant lead for John Faso with just three weeks to go in the Republican Primary for Congress.”

The race for the 19th congressional district’s Republican primary has been a heated contest, with Faso knocking Heaney’s contribution to President Obama’s presidential campaign in 2007, while Heaney has sought to portray Faso as a party insider.

The Hudson Valley district is being vacated this year by Republican Rep. Chris Gibson.

Updated: Heaney campaign spokesman Dave Catalfamo blasted the poll’s findings.

“This poll is as credible as John Faso’s ludicrous claim that he was not the lobbyist who was fined and banned for his role in the Hevesi pay to play scandal,” he said.

ny19poll by Nick Reisman