The Brief Newsom said Trump's deployment of the National Guard and Marines to LA will cost taxpayers an estimated $120 million. Gavin Newsom said Thursday that President Donald Trump's move to deploy the National Guard to Los Angeles during immigration raids and protests will cost taxpayers an estimated $120 million. Currently, 300 National Guard members remain in LA. The backstory:On Tuesday, a federal judge ruled Trump's deployment was illegal. RELATED:Breyer's ruling was based on an 1878 law that prevents federal troops from being used for regular law enforcement activities.