To win a Republican presidential primary, ex-VP must appear loyal to former president while defending his decision during to honor Biden's win

June 19 event in Tulsa, Oklahoma had been due to mark president's return to the campaign trail, but he says he will reschedule 'out of respect' for holiday marking end of slavery

Crowd desists from 'send her back' chants and US president makes only fleeting mention of Ilhan Omar and peers while launching broadsides against political rivals