(Mandel Ngan | AFP via Getty Images)With preparations for the 2030 census already underway, President Trump said Thursday he has instructed his administration to start work on a “new” census. In a social media post, Trump also called for an unprecedented exclusion of millions of people living in the U.S. without legal status. The Census Bureau is in the middle of a more-than-decade-long process to gear up for the 2030 census. Trump’s 2020 census bid to exclude people without legal status was stoppedTrump’s latest push renews similar efforts from his first administration that sparked legal battles. Using the census to ask about a person’s immigration status has yet to be tested by the Census Bureau.