The California state Assembly is weighing another bill aimed at obtaining President Donald Trump’s tax returns, marking the state’s second attempt to pass such legislation in the last two years.

The bill, which passed its first major hurdle in the state Senate late last week, would require all presidential candidates to submit five years’ worth of tax returns in order to appear on the state’s primary ballot in March 2020.

It joins 18 other states in proposing such legislation.

The bill would apply to all candidates but is clearly aimed at Trump, who has long broken with presidential precedent and refused to release his tax returns. Eight of his Democratic challengers have done so, shedding valuable insight on their sources of income and gifts to charity.