MSNBC host Rachel Maddow says she's obtained some of President Donald Trump's tax returns.

The host of "The Rachel Maddow Show" tweeted the news Tuesday night: "We've got Trump tax returns. Tonight, 9pm ET. MSNBC. Seriously."

(Seriously).

— Rachel Maddow MSNBC (@maddow) March 14, 2017

According to Maddow, the documents, which include a 2-page 1040 form from 2005 returns, were turned over to financial investigative journalist and Trump biographer David Cay Johnston. Johnston, who is affiliated with DCreport.org, said he got them in the mail. "They came over in the transom," he told Maddow.

The twitter tease immediately made Maddow a trending topic online, as President Trump is the first sitting president in decades to not publicly release his tax returns. He maintains that they are under audit by the IRS, though the government agency has noted that an audit would not prevent the person under review from releasing the documents.

RELATED | Here's what we know about President Trump's tax returns

The White House issued a statement ahead of the Maddow's show, according to the Associated Press, saying President Trump made more than $150 million in income in 2005 and paid $38 million in income taxes that year.

The White House said that publishing those returns would be illegal.

The statement, as reported by the AP, said, "You know you are desperate for ratings when you are willing to violate the law to push a story about two pages of tax returns from over a decade ago."

The White House added that it is "totally illegal to steal and publish tax returns" and bashed the "dishonest media."