Republican incumbent for Iowa’s 1st District, Rep. Mariannette Miller-Meeks, received a warning sign from a Monday poll, which placed her slightly behind her Democratic challenger.
The new poll from the Des Moines Register shows Miller-Meeks trailing three points behind Democrat Christina Bohannan. It is the closest race in the state, with Republicans favored in all three of Iowa's other House races.
Miller-Meeks defeated a Republican primary challenger earlier this year, but now finds herself sitting at 46% support to Bohannan's 49%.
The Register poll surveyed 811 Iowa adults, including 656 likely voters, from Sept. 8-11. The poll advertises a margin of error of 3.8%.
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The Des Moines Register/Mediacom Iowa Poll has found repeated swings in Miller-Meeks' district throughout the year. In June, the pollsters found Miller-Meeks favored in a 53% to 41% matchup with Bohannon. Another poll in February had Bohannon leading 49% to 45%.
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Meanwhile, the Cook Political Report still has Miller-Meeks' district down as "Lean Republican." Fox News' power rankings also had the district as "Likely Republican" in August.
Miller-Meeks' office did not immediately respond to a request for comment.
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Some Republican voters in the Register poll expressed frustration with Miller-Meeks for not being supportive enough of former President Donald Trump.
"Our own Republicans are so milquetoast wishy-washy that they’re almost worthless, And that’s the category I would put Meeks in," Jim Schenk, a 62-year-old Republican told the paper.
"She’s just sitting there not doing anything," he added. "The only thing you can say about her is that she’s not actively harming us like a Democrat would be doing."
Schenk said he believes Miller-Meeks has been hesitant to defend Trump because she knows she represents a vulnerable district.