MIRS found Whitmer polling at 40 percent, while Thanedar and El-Sayed landed at 19 and 17 percent, respectively. MIRS polled 400 Democratic voters over the phone — 28 percent of the calls went to cell phones — between June 24 and June 26.
That represents a huge swing from polling in early May, which put Thanedar ahead by a small margin. Since then, Whitmer has begun running television ads, and multiple stories questioned Thanedar's progressive credentials. He and El-Sayed are viewed as more progressive than Whitmer, and they appear to be splitting that vote, to a degree.
On the Republican side, MIRS found Michigan Attorney General Bill Schuette leading Lt. Governor Brian Calley by a margin of 45 percent to 16 percent.
MIRS also asked 800 voters from both parties and independents who are likely to cast a ballot in the general election who they would choose in head-to-head match ups between Thanedar and Scheutte, and Whitmer and Schuette. That found Schuette at 37 percent in both surveys, and Whitmer and Thanedar at 42 and 40 percent, respectively.
The primary will be held on Aug. 7.
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