No US President can equal President Obama’s greatness and inspiration in holding court.
The real test for President Biden, NATO, and Europe is yet to come. There is no going back to where Putin/Russia stood pre-invasion. That ship has forever sailed. Any resolution that permits Putin/Russia to maintain a status quo is a failure and allows Putin to regroup. Putin’s aggression has to be repelled and crushed.
How that objective is achieved is the test.