India, Oct. 25 -- DETROIT - Former US President Barack Obama arrived at Cass Technical High School on Saturday evening with a message that was equal parts personal testimony and political warning: that the attacks being levelled against Michigan's Democratic Senate nominee Abdul El-Sayed were not new, not original, and would not work, because he had survived the same ones himself.

Obama told thousands in Detroit that the midterm election could be a "course correction" for the country, urging Michigan voters to support Democrats Jocelyn Benson and Abdul El-Sayed.

As pundits and commentators question whether Michigan's Democratic Party base is unified ahead of the 3 November general election, the party brought one of its most formidable c...