Meet the Press NOW — March 21

Illinois Lt. Gov. Juliana Stratton (D) joins Meet the Press NOW after winning her Senate primary on Tuesday. Director of National Intelligence Tulsi Gabbard testifies on Capitol Hill for the first time since the start of war with Iran. Sen. Markwayne Mullin (R-Okla.), President Donald Trump’s nominee to lead the Department of Homeland Security, is questioned by senators before a vote on his nomination later this month.

President Trump lashes out at NATO allies for rejecting his demand to assist in protecting the Strait of Hormuz, and now says he doesn’t need anyone’s help. NBC News Chief Data Analyst Steve Kornacki previews tonight’s Illinois primary races. NBC News Capitol Hill correspondent Mel Zanona reports on where things stand as President Trump continues to push Congress to pass the SAVE America Act.

President Trump calls on the international community to secure the Strait of Hormuz on Day 17 of the Iran war as gas prices continue to soar. NBC News reports that the president is presented with "off-ramps" to the war on a daily basis. President Trump takes questions in the Oval Office from reporters.

Kristen Welker details her exclusive phone interview with President Trump. Energy Secretary Chris Wright, Sen. Adam Schiff (D-Calif.) and New York Times columnist Thomas Friedman join as energy prices surge and markets tumble as the war with Iran triggers the largest oil supply disruption in history. Lanhee Chen, Sam Jacobs, Faiz Shakir and Melanie Zanona join the roundtable.

The Trump administration downplays concerns about the Strait of Hormuz and the Pentagon is set to deploy approximately 5,000 U.S. sailors & marines to the region. Rep. Valerie Foushee (D-N.C.) joins Meet the Press NOW to discuss the future of the Democratic party following her primary win. Fmr. Homeland Security Secretary Jeh Johnson highlights how the current lapse in DHS funding could raise national security concerns.