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Happening now, a looming ban on TikTok could become a reality within hours after the U.S. Supreme Court unanimously clears the way.

Tonight, President-elect Trump suggests he may step in to save the popular app, telling CNN the decision is ultimately up to him.

Also this hour, the Trump inauguration is moving indoors as the nation's capital is threatened by frigid weather on Monday.

We're tracking all the changes now in the works amid a last-minute scramble by inaugural planners and security officials.

Plus, there's breaking news out of Israel, where Prime Minister Benjamin Netanyahu's cabinet has been deliberating

the Gaza ceasefire and hostage deal for several hours.

As we stand by for a final vote, I'll speak with the lead U.S. negotiator for the deal,

Brett McGurk, in one of his first interviews since the agreement was reached.

Welcome to our viewers here in the United States

and around the world. I'm Wolf Blitzer. You're in the Situation Room.

Tonight, time is running out for TikTok now that the U.S. Supreme Court has upheld a law that could shut off the site for 170 million Americans as soon as Sunday.

CNS. Paula Reid reports on the high court decision and whether soon to be President Trump will give TikTok a reprieve.

A unanimous Supreme Court allowing TikTok to be banned in the U.S. as soon as Sunday

amid bipartisan national security concerns over the popular apps linked to China.

No!

TikTok had argued the ban violated the First Amendment, but the justices disagreed, writing,

...