Gabby and hubby give Hil a boost

GABRIELLE GIFFORDS’ husband joined with Hillary Clinton to pummel Bernie Sanders for his stance on guns Sunday as the Vermont senator showed signs he had rethought his position at the last minute.

Astronaut Mark Kelly — who helped former Rep. Giffords recover from a 2011 assassination attempt in which six people were killed — slammed Sanders during a rally at Five Towns College in Dix Hills, L.I., for voting against the 1993 Brady Bill that mandated background checks for gun buyers.

“That’s a pretty serious vote and one that Hillary Clinton’s opponent did not take too seriously — and that vote is very telling,” Kelly said.

He lamented that Congress failed to pass any legislation to combat gun violence in the wake of the Sandy Hook school massacre, calling politicians’ response “pretty pathetic.”

“I mean, it was basically nothing. After such a horrific tragedy, the United States Senate, in particular, did something remarkable and that was to do nothing,” Kelly said.

Giffords’ endorsement was brief.

“Speaking is difficult for me, but come January, I want to say these two words, ‘Madam President,’ ” the former Arizona congresswoman (inset) said.

Speaking earlier in Mount Vernon, Westchester County, Clinton echoed Giffords, saying she was the only candidate who’d take on the NRA and its enablers.

“The gun lobby is the most powerful lobby in Washington — in our country,” she said, pointing out that the last major restrictions on guns were passed when her husband, Bill Clinton, was President. “Nobody else running on either side is willing to take the stands that I think must be taken.”

She was later joined in Bedford-Stuyvesant, Brooklyn, by Mayor de Blasio.

Sanders, meanwhile, revealed during an interview on CNN’s “State of the Union” that he now supported the right of victims of gun violence to sue firearm manufacturers.

“Of course they have a right to sue, anyone has a right to sue,” Sanders said, referring to families of Newtown victims.

That reply differed from Sanders’ answer to the Daily News Editorial Board that he did not believe gun manufacturers should be held liable.

“Do I think the victims of a crime with a gun should be able to sue the manufacturer?” Sanders said. “No, I don’t.”