Mark Kelly is a reliable ally of President Joe Biden. Except when it comes to the border. The Arizona Democratic senator sounded a rare note of criticism after Biden’s Wednesday night address to Congress, asking the president for more federal resources at the border and calling the influx of migrants coming into his state a “crisis” — language that Biden’s White House is resisting. In his characteristically low-key way, Kelly didn’t back down Thursday from his knock on Biden for omitting a detailed plan for the border and his vow to “continue holding this administration accountable.”