It’s an endorsement no one wants.

Convicted ex-Long Island Rep. George Santos is calling on fellow Republicans to cross party lines and back NYC Mayor Eric Adams’ re-election bid.

This week, the disgraced former congressman took to social media, urging GOP mayoral contender Curtis Sliwa to withdraw from the race. He implored Republicans to unite behind Adams, asserting that he is the strongest candidate to defeat socialist Queens Assemblyman Zohran Mamdani in November’s election.

“New Yorkers face a pivotal decision, and the implications are immense,” Santos expressed on platform X shortly after ex-Governor Andrew Cuomo admitted defeat to Mamdani in the Democratic mayoral primary.

“The decision is obvious: Eric Adams is the sole viable option moving forward. Republicans, conservatives, and sensible voters need to accept the reality that Curtis Sliwa cannot secure a victory in this race,” Santos continued. He is set to begin a seven-year sentence in federal prison on July 25, following his admission to charges of fraud and identity theft.

“Clinging to fantasy only helps the opposition.”

Santos on Wednesday suggested Adams and the Guardian Angels founder iron out a similar “coalition” to one Health and Human Services Secretary Robert Kennedy Jr. cut before dropping out of last year’s president race to back future victor Donald Trump.

“Hey @NYCMayor,” Santos posted on X. “Call Curtis Sliwa and appoint him Deputy Mayor of public safety today and get a coalition going to save NYC!”

Adams, a Democrat, is running as an independent. Despite losing the primary, Cuomo is still on the November ballot as an independent.

Sliwa insisted he’s staying in the race, adding Santos is a fraudster with “no credibility.”

Adams campaign spokesman Todd Shapiro dismissed Santos’ support, saying Adams is “focused on building a broad, credible coalition rooted in integrity and results — not circus sideshows.”