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Biden is delivering his first State of the Union address on Tuesday amid a high-stress period for the nation: a growing fatigue over the pandemic and Russia's continued invasion of Ukraine.

Biden's remarks came shortly after the White House said the Kremlin was behind denial-of-service attacks in Ukraine.

In a brief address, President Biden said reports of Russian troops moving from Ukraine's border would be good news, but the U.S. had not verified it.

Biden has said he will not put American troops in Ukraine to fight any Russian incursion, although the United States is supplying Ukraine with weapons to defend itself. The military moves come amid stalled talks with Russia over its military buildup at Ukraine’s borders.

At a White House event with Breyer, President Biden said it was his intention is to name a nominee to replace him by the end of February.

North Carolina Gov. Roy Cooper and his wife are expected to join the Bidens on Monday during their visit to Fort Bragg.

While it's his first U.N. address as president, Biden is very familiar with the institution, with his history on the Senate Foreign Relations Committee in the 1990s and as vice president.

President Biden speaks after at least 12 U.S. service members were killed in explosions near the Kabul airport in Afghanistan. The attacks also injured at least 60 people, with officials warning that number could grow.

At 4 p.m. ET Sunday afternoon, Biden is expected to address the nation about the administration's ongoing evacuation effort in Afghanistan.

President Biden will deliver another speech about Afghanistan on Friday afternoon, as the scramble to evacuate American citizens and vulnerable Afghans continues.