On March 30, 2025, Donald Trump threatened to impose tariffs on Russian oil exports if Vladimir Putin doesn't agree to a ceasefire in Ukraine within a month. He also stated that if Iran doesn’t make a deal to curb their nuclear weapons program, “there will be bombing.”

On 2025-03-30, Iranian President Masoud Pezeshkian rejected direct negotiations with the US regarding its nuclear program in response to a letter from President Donald Trump, delivered via Oman, leaving open the possibility of indirect talks.

On March 30, 2025, Vladimir Putin suggested Ukraine could be placed under a temporary UN-led government to organize fresh elections before negotiating a peace deal.

On March 30, 2025, Donald Trump met with Finnish President Alexander Stubb at Mar-a-Lago. Stubb suggested a ceasefire in Ukraine by April 20, 2025.

On March 30, 2025, Donald Trump claimed that Ukraine’s president was trying to back out of the minerals deal. Volodymyr Zelenskyy stated the US was “constantly” changing the terms of the deal.

On March 30, 2025, the US introduced a 25% tariff on countries buying crude oil and liquid fuels from Venezuela. This followed accusations from Trump that Venezuela was sending criminals and gang members into the US under the guise of migrants.

On March 30, 2025, Trump stated he was unconcerned about potential tariff-related increases in car prices, facing backlash from within his own party. A CBS News poll found that 52% of Americans disapprove of Trump's handling of the economy, while Senator Rand Paul expressed concern about Trump’s devotion to tariffs.

On March 30, 2025, President Trump signed an executive order seeking broad changes to how elections are run in the U.S., including counting only mail or absentee ballots received by election day and requiring proof of citizenship to vote. States refusing to collaborate with federal law enforcement on election crimes could lose federal grants.

Published on March 30, 2025, President Trump stated in an interview with NBC News on March 30, 2025, that he was not joking about potentially seeking a third term, suggesting "methods" exist to bypass the 22nd Amendment.

On March 30, 2025, Trump's order cracks down on foreign nationals contributing or donating in U.S. elections. The Sixteen Thirty Fund donated a combined $3.9 million to enshrine abortion protections in the Ohio Constitution.

Published on 2025-03-30, President Trump issued an executive order on 2025-03-29 targeting the Smithsonian Institution, accusing it of promoting "improper, divisive or anti-American ideology."

On 2025-03-30, it was reported that on 2025-03-29, Trump talked about a signal leak and auto tariffs to NBC.

On March 30, 2025, it was reported that on March 29, 2025, WPP, a British advertising giant, removed "diversity, equity, and inclusion" from its annual report. This was reportedly due to political events and the Trump administration's attacks on such policies.

Published on 2025-03-30, the article reports a significant decrease in migrant crossings at the California-Mexico border during March 2025, leading to the closure of migrant shelters. The Border Patrol reinforced six miles of the border wall with concertina wire, aided by 750 U.S. military troops.

On Sunday, March 30, 2025, a flight carrying 175 Venezuelan migrants deported from the United States arrived in Caracas.

On 2025-03-30, it was reported that the Department of Homeland Security proposed collecting social media usernames of applicants for immigration benefits to comply with a Trump executive order. The proposal, open for public comment until May 5, raised concerns among immigration and free speech advocates.

On March 30, 2025, a student was detained by ICE in Minnesota for unknown reasons. On Thursday, March 28, 2025, a University of Minnesota graduate student was detained by ICE without prior notice to the university.

As of March 30, 2025, special elections are being prepared in Florida, Texas, Arizona, and Wisconsin, viewed as a test of Trump's early performance in office and the influence of Elon Musk. Key races include Florida's 6th and 1st congressional districts, and a Wisconsin Supreme Court race.

On 2025-03-30, following federal agency cuts by the Trump administration, state and local governments, including Wisconsin, California, and New York, initiated recruitment efforts for unemployed federal workers.

On 2025-03-30, an article discusses whether Donald Trump's actions are following the playbook of Iran's Mahmoud Ahmadinejad, focusing on Trump's dismantling of democratic norms. Another article draws parallels between Joseph McCarthy's era and the current political climate under Donald Trump in March 2025, highlighting mass deportations and arrests.

On March 30, 2025, authorities are investigating a fire at the Republican Party headquarters in New Mexico. The party reported spray-painted letters "ICE=KKK" at the scene, and an alarm at the headquarters went off around 1 a.m., four hours before the fire.

On March 30, 2025, the White House Correspondents’ dinner canceled a comedian's appearance on April 26, 2025, due to the tense political climate under Trump's second term. The White House Correspondents’ Association (WHCA) cited a desire to avoid focusing on "the politics of division."

On 2025-03-30, it was reported that the Dodgers accepted President Trump's invitation to visit the White House on 2025-04-07.

On 2025-03-30, it was reported that the Supreme Court will hear an argument on the tax status of a Wisconsin charity on 2025-03-31. In April 2025, the Supreme Court will consider whether a Catholic charter school in Oklahoma is constitutional and religious objections to curriculum in Maryland schools.