Trump inauguration live updates: Donald Trump moves swiftly to implement his new agenda

The day after the ceasefire deal between Israel and Hamas went into effect, President Trump addressed the future of Gaza after over 15 months of war.

Trump said that he's "not confident" that the ceasefire between Israel and Hamas would stay in effect. "I'm not confident. That's not our war. It's their war," Trump said.

Additionally, the president said Gaza "has to be rebuilt in a different way."

"Gaza is interesting, it's a phenomenal location. On the sea -- The best weather. Some beautiful things could be done with it," Trump said.

In the weeks after winning the election in November, Trump said in a post on Truth Social that imposing tariffs would be one of his first acts as president.

"On January 20th, as one of my many first Executive Orders, I will sign all necessary documents to charge Mexico and Canada a 25% Tariff on ALL products coming into the United States," he wrote.

However, he opted not to include tariffs as one of his top priorities. Instead, during his inauguration speech, he announced the creation of an External Revenue Service that would be in charge of collecting tariffs and other revenue from foreign nations.

Then, later in the evening, he expressed that his administration was "thinking in terms" of imposing 25% tariffs on Mexico and Canada on Feb. 1.

While he has also previously mentioned imposing tariffs on China, he did not mention it during his remarks in the Oval Office on Monday.

Former Proud Boys leader Enrique Tarrio, who was sentenced to 22 years in prison after his conviction of seditious conspiracy in connection with the Jan. 6 riot at the Capitol, is currently being processed for release from his cell in Louisiana following Trump's executive action Monday evening, his lawyer told ABC News.

Tarrio was notably sentenced to the longest term of imprisonment among all of the nearly 1,600 individuals charged in connection with the attack.

Click here for the full story on the Jan. 6 pardons.

Amid a back-and-forth on the future of TikTok in the U.S., Trump signaled that he thinks the U.S. should own "half" of the social media app.

He said to stay in operation in the U.S., TikTok would need to relinquish 50% of its earnings to the U.S. -- Trump did not detail how this deal would work, but said it would be a "joint venture."

The president said he changed his mind about the social media app after using it, but noted he's worried about its impacts on children.

"Because I got to use it," he said about his 180 on TikTok. "And remember, TikTok is largely about kids. Young kids. If China is gonna get information about young kids, I don't know -- to be honest with you, I think we have bigger problems than that."

Trump said that if China does not approve of the 50% sale, it would be considered a "hostile act."