President Biden said Tuesday he would consider personal sanctions against Russian President Vladimir Putin amid mounting tensions over Ukraine. Russia has ordered a series of military drills as the U.S. and NATO build up their military presence in the region, and the U.S. announced plans to ensure adequate fuel supplies to Europe in the event of a Russian embargo. Meanwhile, Ukrainian leadership is warning against spreading panic, saying no decisive moves toward an incursion have been made. Some 100,000 Russian troops have been massed near the Ukrainian border for weeks. Biden addressed the escalating situation at a press event Tuesday.

President Joe Biden: “There will be enormous consequences if he were to go in and invade, as he could, the entire country — or a lot less than that, as well — for Russia, not only in terms of economic consequences and political consequences, but there’ll be enormous consequences worldwide. This would be the largest — if he were to move in with all those forces, it’d be the largest invasion since World War II. It would change the world.”

The Intercept is reporting House Democrats are planning to fast-track a bill that would increase U.S. military aid to Ukraine by $500 million and provide military training to Ukrainian forces.

This comes as political advisers from Russia, Ukraine, France and Germany are holding talks today in Paris. Germany has been more restrained than some of its European neighbors in response to the crisis, opposing sending weapons to Ukraine and warning against harsh sanctions on Russia.