Donald Trump ended 2015 mocking GOP rival Jeb Bush.

“I would feel sorry for @JebBush and how badly he is doing with his campaign other than for the fact he took millions of $’s of hit ads on me,” Trump said in a New Year’s Eve tweet.

Trump, who has previously described Bush as “low energy,” issued the zinger after the former Florida governor predicted voters would ultimately reject the real estate mogul.

“In a month from now, they won’t [agree]. That’s the point,” Bush told NPR.

“The point is that we’re living in this reality-TV kind of political environment, where [Trump] fills the space by saying outrageous things.”

Bush said there’s no meat behind Trump’s controversial pronouncements.

“I think the emotion of the here and now will subside,” Bush added. “Are people scared about the national-security interests of our country being violated because of a lax immigration system, or a visa-waiver program that wasn’t designed for people being radicalized? Yes, they’re scared, and the job of a president — or a candidate, for that matter — isn’t to scare them more. It’s to give them solutions, and that’s what I’m trying to do.”

The RealClearPolitics average of national polls shows Trump with the backing of 35.6 percent of GOP voters and Bush with 4.4 percent.