Trump 2nd term live updates: ICE arrests 956 undocumented immigrants on Sunday

Pete Hegseth was sworn in to lead the Defense Department at the White House on Saturday morning during a ceremony officiated by Vice President JD Vance, who offered the tie-breaking vote on Friday evening to seal his nomination.

Vance offered words of appreciation for the president and Senate before acknowledging the close vote.

Hegseth was joined by his wife and kids as he put his hand on the Bible taking the oath of office. He then praised to God and thanked his wife.

-ABC News' Kelsey Walsh

Sen. Chuck Grassley, R-Iowa said in a statement Saturday that Congress was not given the mandatory 30-day notice over the termination of over a dozen independent inspectors generals.

"There may be good reason the IGs were fired. We need to know that if so. I'd like further explanation from President Trump," the senator said in a statement.

-ABC News' Allison Pecorin

In floor remarks Saturday morning, Democratic Leader Chuck Schumer ripped into the Trump administration for dismissing 17 independent inspectors general.

"It's a preview of the lawless approach that Donald Trump and his administration are taking far too often as he is becoming president," Schumer said.

The senator noted that the dismissals are a possible violation of federal law requiring Congress be given 30-day notice of such a firing.

Schumer said Trump could "well regret" his action.

-ABC News' Allison Pecorin

In a late-night Friday move, President Donald Trump fired at least 17 independent watchdogs -- known as inspectors general -- at multiple federal agencies, sources familiar with the move told ABC News.

While inspectors general can be fired by the president - it can only happen after communicating with Congress 30 days in advance and in 2022 Congress strengthened the law requiring administrations to give a detailed reasoning for the firing of an IG.

At least one high-profile watchdog - Justice Department IG Michael Horowitz - did not receive notice that he was fired as of yesterday evening.

-ABC News' Katherine Faulders, Benjamin Siegel and Alexander Mallin