The secrecy of President Donald Trump s tax returns will be the subject of a hearing next week, Democrats in the House of Representatives announced Thursday.

Democrats have had the power to request Trumps tax returns from the Internal Revenue Service since they assumed control of the House this year, but theyve hesitated. To build the public case for disclosure, the House tax committees oversight panel will examine its authority to obtain the presidents tax returns at a Feb. 7 hearing.

Trump was the first major presidential candidate in 40 years not to release tax returns, which would have revealed detailed information about his sources of income and how much tax he pays. Democrats vowed to get the returns themselves, but havent done it yet.

Pressure is building, with an ABC News/Washington Post poll showing a healthy majority of Americans support the move. Tax March, a coalition of liberal groups, has been pressuring Democrats to hurry up, and Democratic members of the Congressional Progressive Caucus have been getting antsy , too.