Government shutdown updates: Leavitt says Trump exploring cutting aid to Portland

The nonpartisan Congressional Budget Office estimates that if there is a government shutdown, about 750,000 employees could be furloughed each day, with the total daily cost of their compensation estimating $400 million, according to a new report published on Tuesday.

"The number of furloughed employees could vary by the day because some agencies might furlough more employees the longer a shutdown persists and others might recall some initially furloughed employees," CBO states.

The report also reviews how a government shutdown would impact the economy, income and business activity, military, pay for members of Congress, contracts along with National Parks and monuments.

-ABC News' Lauren Peller

As the clock ticks down toward a government shutdown, 150 House Democrats, including House Minority Leader Hakeem Jeffries, gathered on the House steps on Tuesday morning ahead of the government funding deadline -- with Jeffries addressing a deepfake video generated by artificial intelligence shared by President Donald Trump.

The video, shared by Trump on Monday night, disparages Jeffries and Senate Minority Leader Chuck Schumer.

"Mr. President, the next time you have something to say about me, don't cop out through a racist and fake AI video. When I'm back in the Oval Office, say it to my face!" Jeffries said.

Jeffries added that Democrats are "ready" to find a bipartisan path to avert a shutdown -- as he sharply criticized House Republicans for canceling votes this week.

-ABC News' John Parkinson and Lauren Peller

Miami Dade College will be the location for President Donald Trump's presidential library, according to an announcement on Tuesday.

The president selected the location after his son Eric Trump -- who is the president of the Library Foundation -- and his team "evaluated multiple sites across President Trump's home state of Florida."

"No monument can fully capture the scale of my father's legacy, but this library will stand as a tribute to the leader who reshaped history and restored America's strength," Eric Trump said in the announcement.

The library, which will sit on a 2.63-acre site, will be "visible for miles into the Atlantic" and will be a "bold landmark on Miami's skyline," Eric Trump said.

While holding a press conference announcing a deal with Pfizer to lower drug costs, President Donald Trump was asked if a government shutdown is inevitable, to which he replied: "Nothing is inevitable, but it is probably likely."

Trump added that "we can do things during the shutdown that are irreversible," as the government funding deadline approaches.