President Trump denounced a new California law that requires presidential candidates to release their income tax returns.
Trump said in a tweet on Tuesday that the law, signed last week by Gov. Newsom, is "ridiculous" and "unconstitutional."
During the 2016 presidential election, Trump steadfastly refused to share his income tax returns, saying that an IRS audit prevented him from disclosing the forms. He was the first nominee since then-President Gerald Ford in 1976 to withhold the documents.
California's law, which was clearly inspired by Trump's stance, requires any candidate for president or governor to release five years of returns to qualify to appear on the state primary ballot.