Democrats face most contentious – and crucial – test yet with Michigan primary

Voters are faced with the thorny question of electability: who can win this purple state in November and potentially push Democrats toward a US Senate majority?

At Chad Green's house in Davison, Michigan, a brood of baby chicks roamed around the idyllic green lawn as US senators pitched a couple dozen voters on why they should turn out for the hopeful one, Abdul El-Sayed.

Green, a retired federal firefighter, hosted a similar small gathering for Mallory McMorrow, who was running for the US Senate before she dropped out of the race in early July, narrowing the contest to El-Sayed, a progressive insurgent campaigning for universal healthcare, and US representative Haley Stevens, who has branded herself as a workhorse.