Eighteen states, the District of Columbia and San Francisco will seek a preliminary injunction blocking a Trump order denying citizenship to U.S.-born children of unauthorized immigrants.

California, a coalition of other states and the city of San Francisco have sued the Trump administration over President Trump's executive order aimed at ending birthright citizenship, calling it unconstitutional.

The 18 blue states, along with the District of Columbia and city of San Francisco, contend that Trump’s order steamrolls the Constitution.

By Nate Raymond BOSTON (Reuters) -Democratic-led states and civil rights groups have filed the first lawsuits challenging executive orders U.S. President Donald Trump signed after taking office, including one that seeks to roll back birthright citizenship in the U.