Three months after Mr. Biden vowed in a sprawling, two-hour news conference to continue fighting for college tuition, child care, early education, prescription drugs and the environment, the president’s domestic agenda has drastically shriveled.

The fighting in Ukraine has disrupted global oil markets, sending gas prices and inflation in the United States soaring and — for the moment — pushing aside longer-term issues that Mr. Biden had long hoped would become the centerpiece of his legacy.

Mr. Biden, who spent months in congressional negotiations last year, now spends more of his time responding to the global crisis caused by Russia. Last month, he flew to Europe for four days of emergency meetings with allies. The president is expected to attend two more European summits in May and June.