A poll released Wednesday showed Democratic Senate candidates holding narrow leads in Arizona and Nevada, two states where Democrats have the best chance to pick up seats.
A CNN poll found Rep. Kyrsten Sinema (Ariz.) with a 4 point edge over Rep. Martha McSallyMartha Elizabeth McSallyThe Hill's Morning Report - Presented by AT&T - Senate passes infrastructure bill, budget resolution; Cuomo resigns Schumer, Tim Scott lead as Senate fundraising pace heats up GOP group launches million ad campaign pressing Kelly on filibuster MORE (R-Ariz.) in the race to replace retiring Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeBiden nominates former Sen. Tom Udall as New Zealand ambassador Biden to nominate Jane Hartley as UK ambassador: report The Hill's Morning Report - Presented by Goldman Sachs - Voting rights will be on '22, '24 ballots MORE (R). A separate CNN poll showed Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenFormer Sen. Heller to run for Nevada governor Photos of the Week: Infrastructure vote, India floods and a bear The Hill's Morning Report - Presented by Facebook - White House, Dems play blame game over evictions MORE (D-Nev.) leading Sen. Dean HellerDean Arthur HellerFormer Sen. Heller to run for Nevada governor Democrat Jacky Rosen becomes 22nd senator to back bipartisan infrastructure deal 9 Senate seats most likely to flip in 2022 MORE (R-Nev.) by 3 points.
In Nevada, a state that Democrat Hillary ClintonHillary Diane Rodham ClintonClinton lawyer's indictment reveals 'bag of tricks' Attorney charged in Durham investigation pleads not guilty Attorney indicted on charge of lying to FBI as part of Durham investigation MORE narrowly won in the 2016 presidential election, Rosen leads Heller, 48 percent to 45 percent, among registered voters. The poll has a margin of error of 4.2 percentage points.
The Nevada poll surveyed 807 registered voters from Oct. 24-29.
Seventy-eight percent of voters surveyed said they've made up their mind about who they plan to vote for on Nov. 6, while 20 percent said they might change their mind before casting a ballot.
An average of other polls in the Nevada race shows Heller leading by 1.7 points.
In Arizona, where voters have not elected a Democrat to the Senate in 30 years, Sinema leads McSally, 51 percent to 47 percent. That margin is down from September, when Sinema led by 7 points in a CNN poll.
Eighty-six percent of respondents said their mind is made up in the race, while 13 percent said they might still change their decision, according to the most recent poll.
A RealClearPolitics average of all polls in the race shows Sinema leading by less than 1 point.
CNN's Arizona poll surveyed 867 registered voters from Oct. 24-29, and has a margin of error of 4 percentage points.
The two races are likely to play a decisive role in determining control of the Senate. To secure a majority, Democrats would likely have to win both states and retain all of their current seats on Election Day.
Both races are rated "toss-ups" by the nonpartisan Cook Political Report and have drawn in key figures from each party. President TrumpDonald TrumpKinzinger says Trump 'winning' because so many Republicans 'have remained silent' Our remote warfare counterterrorism strategy is more risk than reward Far-right rally draws small crowd, large police presence at Capitol MORE held rallies in Arizona and Nevada earlier this month, and he has visited Nevada multiple times in support of Heller.
Former President Barack ObamaBarack Hussein ObamaOur remote warfare counterterrorism strategy is more risk than reward Clinton lawyer's indictment reveals 'bag of tricks' Chelsea Manning tests positive for COVID-19 MORE and former Vice President Joe BidenJoe BidenSunday shows preview: Coronavirus dominates as country struggles with delta variant Did President Biden institute a vaccine mandate for only half the nation's teachers? Democrats lean into vaccine mandates ahead of midterms MORE stumped for Rosen in Nevada earlier this month. Obama has not visited Arizona, but has endorsed Sinema.