Trump 2nd term updates: Trump says USAID is run by 'radical lunatics'

After being sworn in as the nation's 72nd secretary of state, Marco Rubio promised that every action taken by the department would be determined by the answer to three questions: "Does it make us stronger? Does it make us safer? And does it make us more prosperous?"

Rubio gave remarks in Spanish as well, giving thanks to God, his family present and not present, including his parents, who he said came to the U.S. in 1956 -- and that the purpose of their lives was that their children could realize dreams not possible for them.

"It's an incredible honor to be the secretary of state of the most powerful, best country in the world," he continued in Spanish, giving thanks to Trump for the opportunity.

Rubio also echoed themes from Trump's inaugural address and reiterated the president's agenda.

"As far as the task ahead, President Trump was elected to keep promises. And he is going to keep those promises. And his primary promise when it comes to foreign policy is that the priority of the United States Department of State will be the United States. It will be furthering the national interest of this country," Rubio said.

- ABC News' Shannon Kingston

The Senate Foreign Relations Committee began its confirmation hearing for Trump's United Nations Ambassador nominee, Republican Rep. Elise Stefanik.

Stefanik, a Republican member of Congress from New York's 21st District, joined House leadership in May 2021, when she was elected as chair of the House Republican Conference.

She replaced former Rep. Liz Cheney in the role after Cheney was denounced by her party for her criticism of Trump in the wake of Jan. 6.

Doug Collins, Trump’s choice to lead the Veterans Affairs Department, will face questions from lawmakers as his confirmation hearing gets underway.

Collins, a former congressman, is a Navy veteran who currently serves as a chaplain in the U.S. Air Force Reserve Command.

He was the top Republican on the House Judiciary Committee during Trump’s first impeachment, and had defended the president.

After being unanimously confirmed by the Senate on Monday night, Secretary of State Marco Rubio was officially sworn in by Vice President JD Vance on Tuesday morning.

Rubio joined ABC’s “Good Morning America” ahead of the ceremony, where he discussed Trump’s pardons for Jan. 6 rioters, TikTok and the Russia-Ukraine war.

Rubio sidestepped directly weighing on the pardons, saying his “focus needs to be 100% on how I interact with our counterparts, our adversaries, our potential enemies around the world to keep this country safe, to make it prosperous.”

When asked about Trump’s campaign pledge to end the conflict between Russia and Ukraine on Day 1, Rubio contended the matter is more complex and that negotiations would not be played out in public.

“Look this is a complex, tragic conflict, one that was started by Vladimir Putin that’s inflicted a tremendous amount of damage on Ukraine and also on Russia, I would argue, but also on the stability of Europe,” Rubio said. “So the only way to solve these things, we got to get back to pragmatism, but we also get back to seriousness here, and that is the hard work of diplomacy. The U.S. has a role to play here. We’ve been supportive of Ukraine, but this conflict has to end.”

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Secretary Marco Rubio talks Trump’s international agendaThe newly-confirmed Secretary of State talks about becoming the first Latino to occupy the job, plans for the TikTok ban and President Donald Trump’s pardon of Jan. 6 defendants.

ABCNews.com