President Donald Trump has threatened to deploy federal immigration agents to airports if Congress refuses to fund the Department of Homeland Security (DHS). This comes as the Trump administration has faced criticism for aggressive deportation tactics by ICE and Border Patrol agents. Tesla CEO and former Trump advisor Elon Musk has offered to cover the paychecks of TSA agents as the shutdown continues. The effects of the funding lapse and lack of pay are being felt at U.S. airports, where Transportation Security Administration agents are quitting or calling out sick due to lack of agents. The shutdown has been less disruptive than last year's record-long government shutdown.