David M Jackson

USA TODAY

President Trump says he is unimpressed with this weekend's tax protests — and indicated he has no plans to release his tax returns anytime soon.

"Someone should look into who paid for the small organized rallies yesterday. The election is over!" Trump tweeted Sunday.

Organizers said more than 100,000 people — some with inflatable rubber chickens — marched in cities across the United State on Saturday to protest Trump's refusal to release his tax returns. With this year's tax deadline approaching Tuesday, Trump is expected to maintain his refusal as president, breaking a four-decade precedent followed by presidents of both parties.

During a rally at the U.S. Capitol, U.S. Rep. Jamie Raskin, D-Md., said, "how can we determine his conflicts of interests or stop him from receiving payments from foreign governments if he won't show us the names of the people and corporations that he is in active partnership with all over the world?"

Read more:

Trump’s tax returns will be immediately under audit

With Tax March, Democrats become party of revolt amid rising inequality

In blasting the protesters, Trump tweeted that "I did what was an almost an impossible thing to do for a Republican-easily won the Electoral College! Now Tax Returns are brought up again?"

Actually, Trump's win was quite narrow. He lost the popular vote to Democratic candidate Hillary Clinton, and won just more than 300 electoral votes because of close wins in the states of Pennsylvania, Michigan, and Wisconsin.