WASHINGTON The success of President Biden in pushing an infrastructure deal over its first major hurdle this Week was a vindication his faith and belief in bipartisanship, and a repudiation for the slash and burn politics of his immediate predecessor, Donald J. Trump who tried to block it.As an anti-Trump insider, Mr. Biden viewed compromise as a virtue and not a missed chance to defeat a rival. He has maintained the promise of a broad infrastructure agreement as a priority policy issue as well as as a test of his fundamental reasoning for his presidency.The president's success or failure to keep the bill on track will determine his legacy. It could also be his best chance to fulfill his promise that he can bring together lawmakers from all parties to solve big problems even in a period of extreme polarization.As senior advisor to President Biden, Mike Donilon wrote that the country must unite to face the challenges and deliver results for working families in a memo released by the White House on Thursday. Senior officials praised the importance of the agreement. The American people accepted that message. Although many pundits doubted the possibility of bipartisanship, the American people are clear that it is possible.