WASHINGTON — President Joe Biden on Tuesday unveiled plans to clamp immediate significant restrictions on migrants seeking asylum at the U.S.-Mexico border as the White House moved to neutralize immigration as a political liability ahead of the November elections.

The long-anticipated presidential proclamation would bar migrants from being granted asylum when U.S. officials deem that the southern border is overwhelmed. The Democratic president had contemplated unilateral action for months after the collapse of a bipartisan border security deal in Congress that most Republican lawmakers rejected at the behest of former President Donald Trump, the presumptive GOP presidential nominee.