A federal court is hearing arguments over the Trump administration's use of the California National Guard in Los Angeles is underway. MSNBC Legal Correspondent Lisa Rubin, former Senior Executive in the FBI Counterterrorism Division Christopher O’Leary and senior director of the Brennan Center's Liberty and National Security Program Elizabeth Goitein joins Katy Tur to discuss.

President Donald Trump this month enacted a travel ban on 12 countries and imposed restrictions on seven others, although no previously issued visas have been revoked. His proclamation instead banned issuing new visas to citizens of the 12 countries.

Creating guardrails for AI can’t wait, says Jake Sullivan, and the responsibility may ultimately fall on the shoulders of CEOs.

The Trump administration has tapped a former army special operations officer with significant business experience who once oversaw a large U.S.-Russia investment forum to manage Europe and Russia policy at the National Security Council,

Trump arrived at the White House early Tuesday at a moment of choosing in his presidency. Israel, with five days of missile strikes, has done considerable damage to Iran and believes it can now deal a permanent blow to Tehran’s nuclear program — particularly if it gets a little more help from the Republican president.