‘He’s a force’: Obama answers call to boost Democrats – and rattle Trump

Former president has given series of blistering speeches to help candidates in key races - and deployment has proved a hit with party's progressive wing

That could have been awkward. Barack Obama, campaigning for Senate candidate Abdul El-Sayed in Michigan, acknowledged that his fellow Democrat has criticised some aspects of the Obama presidency.

Yeah, Abdul didn't agree with some things we wanted to do - that our administration was doing - when I was president," he told a rally in Detroit. You know who else doesn't agree with everything I do? Michelle Obama." The crowd erupted in laughter. I'd say about five times a day, she says, You knucklehead. Why you do that?'"