Facing criticism over efforts to produce citizenship data to comply with an order from President Donald Trump, U.S. Census Bureau director Steven Dillingham said Monday that he planned to resign with the change in presidential administrations.

Dillingham said in a statement that he would resign on Wednesday, the day Trump leaves the White House and President-elect Joseph Biden takes office. Dillingham’s term was supposed to be finished at the end of the year.

The Census Bureau director’s departure comes as the statistical agency is crunching the numbers for the 2020 census, which will be used to determine how many congressional seats and Electoral College votes each state gets, as well as the distribution of $1.5 trillion in federal spending each year.

In his statement, Dillingham said he had been considering retiring earlier, but he had been persuaded at the time to stick around.

“But I must do now what I think is best,” said Dillingham, 68. “Let me make it clear that under other circumstances I would be honored to serve President-Elect Biden just as I served the past five presidents.”

A Census Bureau spokesman said the agency’s chief operating officer, Ron Jarmin, will assume the director’s duties. Jarmin served in the same role before Dillingham became director two years ago.

Last week, Democratic lawmakers called on Dillingham to resign after a watchdog agency said he had set a deadline that pressured statisticians to produce a report on the number of people in the U.S. illegally.

A report by the Office of Inspector General last week said bureau workers were under significant pressure from two Trump political appointees to figure out who is in the U.S. illegally using federal and state administrative records, and Dillingham had set a Friday deadline for bureau statisticians to provide him a technical report on the effort.

One whistleblower told the Office of Inspector General that the work was “statistically indefensible.”

After the release of the inspector general’s report, leaders of the National Association of Latino Elected and Appointed Officials, Asian Americans Advancing Justice and The Leadership Conference on Civil and Human Rights called for Dillingham’s resignation, and several Democratic lawmakers followed suit.

Dillingham then ordered an indefinite halt to the efforts to produce data showing the citizenship status of every U.S. resident through administrative records.

During Dillingham’s tenure, the Trump administration unsuccessfully tried to put a citizenship question on the 2020 census questionnaire, and the president issued two directives that advocacy groups said were part of efforts to suppress the participation of minorities and immigrants in the head count of every U.S. resident.

Trump’s first directive, issued in 2019, instructed the Census Bureau to use administrative records to figure out who is in the country illegally after the Supreme Court blocked the citizenship question. In the second directive last year, Trump instructed the Census Bureau to provide data that would allow his administration to exclude people in the U.S. illegally from the numbers used for divvying up congressional seats among the states.

An influential GOP adviser had advocated excluding them from the apportionment process in order to favor Republicans and non-Hispanic whites, even though the Constitution spells out that every person in each state should be counted. Trump’s unprecedented order on apportionment was challenged in more than a half-dozen lawsuits around the U.S., but the Supreme Court ruled last month that any challenge was premature.

Dillingham oftentimes appeared cut out of the loop on these census-related decisions made by the White House and Commerce Department, which oversees the Census Bureau. At a congressional hearing in July, Dillingham said he wasn’t informed ahead of time before Trump issued his directive on the apportionment numbers.

The pandemic and errors found in the data have forced the Census Bureau to delay releasing the numbers used to apportion congressional seats until early March.

Last week, the Department of Justice and municipalities and advocacy groups that had sued the Trump administration over the 2020 census agreed to put the lawsuit on hold for 21 days so the Biden administration can take power and decide how to proceed with the census and the litigation.

“Director Dillingham’s departure will coincide with the inauguration of President-elect Joe Biden and Vice President-elect Kamala Harris, providing the new administration the opportunity to appoint competent, ethical leadership committed to the scientific integrity of the Census Bureau,” Arturo Vargas, CEO of the National Association of Latino Elected and Appointed Officials (NALEO) Educational Fund, said Monday.