They were pointed questions, not personal criticisms. But they will have conveyed a warning to Joe Biden that the patience of the left of the Democratic party and its leaders in ‘the Squad’ of progressive politicians is not infinite. “Are we passing the deal that helps working people the most?” asked Alexandria Ocasio-Cortez, the firebrand New York congresswoman and best known member of the squad. “Are we passing the deal that makes the most jobs? Are we passing a deal that brings down the most climate emissions? Are we passing a deal that raises wages and actually improves our infrastructure for the next generation?” Ocasio-Cortez’s appearance on the influential TV program Morning Joe last week came with the US president weeks into negotiations with Republicans over a massive infrastructure spending package – and apparently little to show for it.