President Trump took aim at Amazon in a Twitter post on Thursday, accusing the mega online retailer of not paying its share of taxes and driving retail stores out of business.

“​I have stated my concerns with Amazon long before the Election​,” Trump said on Twitter. “Unlike others, they pay little or no taxes to state & local governments, use our Postal System as their Delivery Boy (causing tremendous loss to the U.S.), and are putting many thousands of retailers out of business!​”​

​White House press secretary Sarah Huckabee Sanders on Wednesday addressed reports that Trump was about to take action against Amazon — whose founder, Jeff Bezos, also owns the Washington Post — during a news briefing Wednesday.​

“We have no announcements and no specific policies or actions that we are currently pushing forward or considering taking​,​” ​she said, adding that ​”the ​p​resident has said many times before he’s always looking to create a level playing field for all businesses, and this is no different.​”​

A report on the Axios website on Wednesday said Trump is “obsessed” with the e-commerce giant and wants to “go after” the company because it has gotten a free ride from taxpayers and his developer friends claim it is killing brick-and-mortar stores and malls.

​”​He’s wondered aloud if there may be any way to go after Amazon with antitrust or competition law​,​”​ Axios reported, citing a source close to the president.

He’s also eyeing Amazon as retaliation against Bezos, who he says wields the newspaper against him like a weapon.

Staffers have tried to explain to Trump that the Postal Service has actually benefited from Amazon, even adding Sunday deliveries in 2013 as demand for packages increased.

In 1992, the Supreme Court ruled that states couldn’t collect sales taxes from mail order businesses unless they had a physical presence in the state.

In 2013, the high court decided against a challenge to that ruling that attempted to include online retailers.

Amazon shares were down 0.4 percent in pre-trading Thursday.