Obama fills out his census form

President Barack Obama filled out his 2010 Census form Thursday morning, the White House said. 

The president took some time in the Oval Office to fill out the decennial survey of the U.S. population, and officially declared April 1st "Census Day," according to the White House blog

The president, the White House pointed out, is among the millions of families who lives in a non-traditional household. First Lady Michelle Obama's mother lives with the First Family at the White House, and was included by the president in their census filing. 

The census, which is called for in the U.S. Constitution, is used for apportionment of government resources, and also shapes the allotment of congressional seats different states are given.

Some Republican lawmakers like Rep. Michele Bachmann (R-Minn.) have raised concerns about the political uses of the census, as well as the use of outside groups to help encourage returns of the forms.

Obama's census filing was tweeted out Thursday by White House Deputy Press Secretary Bill Burton.