The Panthers (40-24-9) are first in the Atlantic Division, two points ahead of the Tampa Bay Lightning and three ahead of the Boston Bruins. They play at Boston on Thursday and at Tampa Bay on Saturday.
It was Nash's first goal since Dec. 30 and first point in six games since returning from a 20-game absence because of a left-leg injury. The goal came less than two minutes after Lundqvist preserved a 2-1 lead with a save on Jussi Jokinen's shot off a shorthanded rush at 9:31.
"After I made that save, we get the puck up there and I was kind of hoping for Nash to get one, and it played perfectly," Lundqvist said. "I think that goal meant a lot to him and it was a big goal for the team as well, so it was nice to see."
In addition to Nash, Viktor Stalberg ended a 17-game goal drought when he scored in the first period, Mats Zuccarello ended a four-game point drought with a power-play goal in the second, and Tanner Glass got an empty-net goal with 8.2 seconds left.
"We all felt more like ourselves there," Rangers captain Ryan McDonagh said. "I thought we were back defending the way we want to and keeping a lot of their skilled and rush plays to a minimum. All around, a lot of guys contributing throughout our lineup."