The District of Columbia is challenging President Donald Trump’s use of the National Guard in Washington. The city is asking a federal court to intervene even as Trump plans to send troops to other cities in the name of driving down crime. The district said in a lawsuit that the deployment, which now involves more than 1,000 troops, is an illegal use of the military for domestic law enforcement. The White House says deploying the Guard to protect federal assets and assist law enforcement is within Trump’s authority as president.