Hundreds of West Virginia National Guard members will deploy across the nation's capital as part of the Trump administration's effort to overhaul policing in the District of Columbia through a federal crackdown on crime and homelessness.

Gov Patrick Morrisey, R-W.Va., announced Saturday that he was sending a contingent of 300 to 400 to nearby Washington at the Republican administration's request. They will arrive in the district along with equipment and specialised training services, his office said in a statement.

'West Virginia is proud to stand with President Trump in his effort to restore pride and beauty to our nation's capital,' Morrisey said. 'The men and women of our National Guard represent the best of our state, and this mission reflects our shared commitment to a strong and secure America.'