In today’s issue: One of the most contentious Democratic Senate primaries this year is now set to be a head-to-head matchup between the two wings of the party. Michigan state Sen. Mallory McMorrow (D) suspended her campaign Sunday after seeing a significant drop in polls. That leaves the contest between moderate Rep. Haley Stevens (D-Mich.) and progressive former Wayne County health director Abdul El-Sayed. The timing is critical, as…