How to Watch Joe Biden Speech as President Reveals U.S. Response to Russia's Invasion

President Joe Biden may be about to deliver the most important speech of his presidency so far when he speaks to the nation on Thursday to outline the U.S. response to Russia's invasion of Ukraine.

Biden is expected to address the American public from the East Room of the White House at 12.30 p.m. E.T., according to a public schedule released on Thursday morning.

The speech will be broadcast on all the major news networks and it should be available as a livestream on the White House website. The speech may also be viewed via news outlets on social media sites, such as Facebook and Twitter.

It isn't yet clear what fresh sanctions against Russia Biden may announce.

The administration warned last week that it has prepared a package that would turn Moscow into an international "pariah."

Russian President Vladimir Putin ordered what he described as a "special military operation" into Ukraine late on Wednesday and Ukrainian officials have said a "full-scale invasion" is underway.

Biden was in the White House Situation Room on Thursday morning as fighting took place between Russian and Ukrainian forces.

"President Biden met with his national security team in the Situation Room this morning to discuss the latest developments in Ukraine," the White House said in a tweet.

"He discussed how we will hold Russia accountable for its unprovoked and unjustified attack on Ukraine," they said.

In statements issued overnight, President Biden pledged continued support for Ukraine and condemned Russia's actions. Biden said he had spoken to Ukrainian President Volodymyr Zelenskyy and that he would meet with the G7 on Thursday.

The U.S. and its allies "will be imposing severe sanctions on Russia," Biden's statement said.

"We will continue to provide support and assistance to Ukraine and the Ukrainian people," the president said.

In a statement issued before his call with Zelenskyy, Biden said he would "speak to the American people to announce the further consequences the United States and our Allies and partners will impose on Russia for this needless act of aggression against Ukraine and global peace and security."

"We will also coordinate with our NATO Allies to ensure a strong, united response that deters any aggression against the Alliance," Biden added.

The Biden administration previously warned of "swift" and "severe" sanctions against Russia in the event of invasion.

While Biden announced some sanctions against the country on Tuesday, including preventing purchases of Russian sovereign debt, those measures were implemented before Putin ordered the military operation currently in progress.

Vice President Kamala Harris threatened Moscow with "unprecedented economic costs" if it invaded Ukraine during a speech at the Munich Security Conference in Munich on Saturday.

The day before Harris' remarks, Deputy National Security Adviser Daleep Singh said the administration had prepared sanctions that would make Russia "a pariah to the international community."

There is significant pressure on the administration to fulfil those promises and the president is expected to impose sweeping sanctions on Russia on Thursday. A coordinated approach with allies is also expected.

U.K. Prime Minister Boris Johnson delivered a brief address to his country on Thursday and previewed strong sanctions against Russia. The U.K. is a member of both NATO and the G7.

'Massive Package' of Sanctions

"Today, in concert with our allies, we will agree a massive package of economic sanctions designed in time to hobble the Russian economy," Johnson said.

"And to that end, we must also collectively cease the dependence on Russian oil and gas that for too long has given Putin his grip on Western politics," the prime minister said.

The European Union has also condemned Russia's actions, along with individual European governments, with the bloc's High Representative for Foreign Affairs Josep Borrell promising "the harshest package of sanctions we have ever implemented."

Both Borrell and Zelenskyy invoked World War II in statements on Thursday amid concerns about the extent of the Russian invasion and the potential loss of life.

Newsweek has asked the White House for comment.

Joe Biden Delivers Remarks in D.C.
U.S. President Joe Biden speaks during the 90th Winter Meeting of USCM on January 21, 2022, in Washington, DC. Biden will address the nation on Thursday and is expected to impose new sanctions on Russia. Alex Wong/Getty Images