Trump opponents sue to force census to report number of illegal immigrants

Civil liberties groups and a coalition of states, cities and counties filed lawsuits Friday challenging President Trump’s new policy to discount illegal immigrants when the census reports the population for purposes of apportioning congressional districts next year.

The challengers said Mr. Trump is blatantly violating the Constitution by refusing to report the actual count of all people residing in the country, regardless of legal status.

Mr. Trump earlier this week signed a directive telling the Commerce Department that though everyone will be counted, it must try to figure out who...