Census Bureau Director Steven Dillingham holds up his mask with the words "2020 Census" as he testifies before a House…
Census Bureau Director Steven Dillingham holds up his mask with the words '2020 Census' as he testifies before a House Committee on Oversight and Reform hearing on the 2020 Census​ on Capitol Hill, July 29, 2020, in Washington.

The U.S. Census Bureau director testified Wednesday that he was not given advance notification about an order by the Trump administration that called for undocumented immigrants to be excluded from the national census.

President Donald Trump issued an executive order earlier this month in which he argued that having people who are in the country illegally affect representation in Congress “would be a perversion of our democratic principles.”

Steven Dillingham was called before the U.S. House of Representatives Oversight Committee to discuss the order affecting the 2020 census, the once-a-decade count of every person living in the United States and its five territories.

The census has vast implications for the country. The results are used to decide how many congressional seats each state gets, as well as the allocation of hundreds of billions of dollars in federal spending.

Dillingham told lawmakers that he did not know if any Census Bureau staff were involved in drafting the order, which has been called unconstitutional by civil rights groups.

The Democrats who chair the House Oversight Committee said Trump’s order went against prior assurances from administration officials who pledged at earlier hearings to conduct a complete count that includes everyone residing in the United States.

But Republicans said the order was constitutional, saying the president’s order applied only to redrawing the congressional districts, not the count or how $1.5 trillion in federal spending is distributed.

The Census Bureau was forced to suspend field operations in March and April because of the coronavirus pandemic. The deadline for finishing the count was pushed from July 31 to October 31.

Dillingham also offered in his testimony that despite the coronavirus pandemic, the 2020 census self-response has been a “tremendous success.”

“We are now at almost 63 percent, with more than 92 million households counted. About 80 percent have chosen to respond using the internet. Our response system has not had a single minute of downtime since we first invited people to respond online, beginning in March,” he said.