President Trump in a tweet early Monday said Washington is “actually worse than anyone thought.”

“Drain the Swamp should be changed to Drain the Sewer,” Trump said, adding that “it begins with the Fake News!”

Drain the Swamp should be changed to Drain the Sewer - it's actually much worse than anyone ever thought, and it begins with the Fake News! — Donald J. Trump (@realDonaldTrump) July 24, 2017

It is unclear what prompted the tweet, which came hours before Trump's son-in-law, Jared Kushner, is scheduled to appear before the Senate Intelligence Committee in a closed hearing.

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Kushner, who is also a senior White House adviser, has emerged as a person of interest in ongoing investigations into Russian election meddling and possible collusion between the Trump campaign and Moscow.

He has faced scrutiny over his previously undisclosed meetings with Russian nationals and officials, and it was recently revealed that he attended a meeting last year with a Russian lawyer promising compromising information about then-Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE.

"After 1 year of investigation with Zero evidence being found, Chuck Schumer Chuck SchumerJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee CNN's Toobin: Democrats are 'wimps' who won't 'have the guts' to add Supreme Court seats Republican senator says plans to confirm justice before election 'completely consistent with the precedent' MORE just stated that 'Democrats should blame ourselves,not Russia.'" Trump said in a subsequent tweet on Monday morning.

After 1 year of investigation with Zero evidence being found, Chuck Schumer just stated that "Democrats should blame ourselves,not Russia." — Donald J. Trump (@realDonaldTrump) July 24, 2017

Congressional Democrats will reveal their economic agenda later on Monday.

In the buildup to that announcement, Senate Minority Leader Charles Schumer (D-N.Y.) said in an interview on Sunday that Democrats "didn't tell people what we stood for" in the 2016 election.

This report was updated at 6:58 a.m.