Washington's state Senate passed a bill this week that would drop President Trump Donald John TrumpColorado governor signs national popular vote bill into law Tree of Life rabbi responds to New Zealand attack: Like 'a horror film all over again' Graham says he'll probe Rosenstein's 25th Amendment remarks MORE from the state's 2020 presidential ballot until he releases his tax returns.

The bill, which advanced Tuesday to the state's House of Representatives, according to CBS News, would require any candidate on the ballot for president in the state to release five years of tax returns before appearing in a general or primary election.

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Senators voted by a 28-21 margin to approve the bill, according to CBS. The state's attorney general and solicitor told lawmakers in a letter this week that the proposal likely was constitutional, but analysts expect the law if passed to be challenged in federal court.

"The disclosure requirement you propose is likely Constitutional," the two wrote to lawmakers, according to CBS, adding that the measure "would definitely be challenged in court."

Democrats who supported the bill said the provision was necessary to force a return to norms surrounding the release of presidential candidates' tax returns.

"Although releasing tax returns has been the norm for about the last 40 years in presidential elections, unfortunately we've seen that norm broken," said Sen. Patty Kuderer (D), who sponsored the bill, according to CBS.

Republicans, however, argued that the state was getting into questionable territory by attempting to impose rules on a federal election.

"We're on really risky ground when we're trying to place conditions on a federal election," said Sen. Hans Zeiger (R), according to CBS.

Trump caused controversy throughout the 2016 campaign with his refusal to release his tax returns, claiming at the time to be under audit by the IRS. In recent weeks, Democrats in the House have indicated that they may pursue Trump's returns in the hopes of investigating the president's finances for criminal activity.

A similar bill recently advanced in New Jersey's state Senate and is currently sitting in the state's General Assembly.