In all of the tested states, voters oppose the government shutdown by lopsided margins, a sign that the shutdown may be damaging Republicans' electoral chances.

Sens. Mark PryorMark Lunsford PryorCoronavirus poses risks for Trump in 2020 Tom Cotton's only Democratic rival quits race in Arkansas Medicaid rollback looms for GOP senators in 2020 MORE (D-Ark.), Mary LandrieuMary Loretta LandrieuBottom line A decade of making a difference: Senate Caucus on Foster Youth Congress needs to work to combat the poverty, abuse and neglect issues that children face MORE (D-La.) and Kay HaganKay Ruthven HaganThe Hill's Campaign Report: Democratic Unity Taskforce unveils party platform recommendations Democrats awash with cash in battle for Senate The Hill's Campaign Report: Trump's job approval erodes among groups that powered his 2016 victory MORE (D-N.C.) all hold leads over their GOP opponents in the surveys, conducted by the Democratic firm Public Policy Polling.

Landrieu leads Rep. Bill Cassidy (R-La.) 48 percent to 41 percent. That lead grows to 52 percent to 42 percent after voters are informed about the candidates' positions on the shutdown. Pryor leads 44 percent to 41 percent over Rep. Tom CottonTom Bryant CottonWells Fargo told employees to delete TikTok from work phones Public letter in Harper's sparks furor Koch-backed group urges Senate to oppose 'bailouts' of states in new ads MORE (R-Ark.), and that lead remains steady after the shutdown questions are asked. Hagan leads a generic Republican challenger 47 percent to 42 percent, and that lead jumps to 49 percent to 41 percent when voters are told she opposed the shutdown.

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Rep. Gary Peters (D-Mich.) leads former Michigan Secretary of State Terri Lynn Land (R) 43 percent to 36 percent, and that lead jumps to 50 percent to 36 percent when voters are told he opposed the shutdown. Rep. Bruce BraleyBruce Lowell Braley2020 caucuses pose biggest challenge yet for Iowa's top pollster OPINION | Tax reform, not Trump-McConnell feuds, will make 2018 a win for GOP Ten years later, House Dems reunite and look forward MORE (D-Iowa) holds a lead of 45 percent to 41 percent over a generic Republican candidate, and that expands to 46 percent to 39 percent when voters are told he opposed the shutdown.

Georgia's Senate race could also be affected by the shutdown. Democrat Michelle Nunn starts off tied at 42 percent with a generic Republican in the race. When voters are told that three of her potential opponents, Reps. Phil GingreyJohn (Phil) Phillip GingreyEx-Tea Party lawmakers turn heads on K Street 2017's top health care stories, from ObamaCare to opioids Beating the drum on healthcare MORE (R-Ga.), Jack Kingston (R-Ga.) and Paul BrounPaul Collins BrounHundreds apply to fill Isakson's Senate seat in Georgia Joe Lieberman's son running for Senate in Georgia California lawmaker's chief of staff resigns after indictment MORE (R-Ga.) all supported the GOP position on the shutdown, she opens up a 6 percentage point lead.

Partisan polls should always be read with some amount of skepticism, and the way the question is worded seems to place the blame completely on the GOP, which may not be how voters view the situation and could inflate Democrats' standing in some of the later ballot tests. The shutdown appears to be nearing its conclusion, as well, and it's unclear how much this debate will impact an election that's more than a year away.

But nonpartisan national polling has found that voters blame the GOP much more for the shutdown than Democrats, and these results indicate that the ongoing shutdown may be badly hurting Republicans' hopes of winning a majority in the Senate next year.

"These polls make it clear that across the country, whether a state voted for Obama by 10 points or voted for Romney by 20, voters are extremely angry about the government shutdown. And it’s going to make Republican hopes of taking back the Senate next year that much harder," writes PPP pollster Tom Jensen in the memo.

--This report was updated at 1:59 p.m.