President Trump spent Christmas Eve touting tax reform and bashing “Fake News” — while U.S. Sen. Bernie Sanders sounded off from the left in a holiday Twitter fight.

“The Tax Cut/Reform Bill, including Massive Alaska Drilling and the Repeal of the highly unpopular Individual Mandate, brought it all together as to what an incredible year we had. Don’t let the Fake News convince you otherwise … and our insider Polls are strong!” Trump tweeted yesterday afternoon.

Earlier, the president grumbled, “The Fake News refuses to talk about how Big and how Strong our BASE is. They show Fake Polls just like they report Fake News. Despite only negative reporting, we are doing well – nobody is going to beat us. MAKE AMERICA GREAT AGAIN!”

He also got in a dig at a favorite target, the deputy FBI director.

“@FoxNews-FBI’s Andrew McCabe, ‘in addition to his wife getting all of this money from M (Clinton Puppet), he was using, allegedly, his FBI Official Email Account to promote her campaign. You obviously cannot do this. These were the people who were investigating Hillary Clinton.’ ”

Sanders, in a reference to the tax reform bill passed by Congress last week, sniped on Twitter:

“What we could do with $1.5 trillion:

-Make college tuition-free

-Provide universal preschool

-Repair our crumbling infrastructure

-Fund CHIP for 107 years

-Rebuild Puerto Rico

What Republicans did:

-Give tax breaks to the wealthy and corporations.”

Earlier, Sanders snarked, “At least Trump is finally telling the truth about his tax bill,” retweeting a CBS report, “ ‘You all just got a lot richer,’ President Trump told friends dining at Mar-a-Lago Friday night, hours after signing tax overhaul into law.”

And Sanders added, referring to the upcoming midterm elections, “If I were the Republicans, I would worry very much about 2018.”

Trump had tweeted Saturday, “Remember, the Republicans are 5-0 in Congressional races this year. In Senate, I said Roy M would lose in Alabama and supported Big Luther Strange – and Roy lost. Virginia candidate was not a ‘Trumper,’ and he lost. Good Republican candidates will win BIG!”

Earlier, Trump crowed, “The Stock Market is setting record after record and unemployment is at a 17 year low. So many things accomplished by the Trump Administration, perhaps more than any other President in first year. Sadly, will never be reported correctly by the Fake News Media!”