Poll: Dems hold slim lead in Arizona, Nevada Senate races

Poll: Dems hold slim lead in Arizona, Nevada Senate races
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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 McSallyFighter pilot vs. astronaut match-up in Arizona could determine control of Senate Air Force probe finds no corroboration of sexual assault allegations against Trump pick Ex-FBI official names right-wing extremism one of the biggest security challenges for 2020 MORE (R-Ariz.) in the race to replace retiring Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeArpaio considering running for former sheriff job after Trump pardon Overnight Energy: Warren edges past Sanders in poll of climate-focused voters | Carbon tax shows new signs of life | Greens fuming at Trump plans for development at Bears Ears monument Carbon tax shows new signs of life in Congress MORE (R). A separate CNN poll showed Rep. Jacky RosenJacklyn (Jacky) Sheryl RosenHillicon Valley: Trump seeks review of Pentagon cloud-computing contract | FTC weighs updating kids' internet privacy rules | Schumer calls for FaceApp probe | Report says states need more money to secure elections Senators introduce legislation to boost cyber defense training in high school Key endorsements: A who's who in early states MORE (D-Nev.) leading Sen. Dean HellerDean Arthur HellerThis week: Barr back in hot seat over Mueller report Trump suggests Heller lost reelection bid because he was 'hostile' during 2016 presidential campaign Trump picks ex-oil lobbyist David Bernhardt for Interior secretary MORE (R-Nev.) by 3 points.

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In Nevada, a state that Democrat Hillary ClintonHillary Diane Rodham ClintonTop Sanders adviser: Warren isn't competing for 'same pool of voters' Anti-Trump vets join Steyer group in pressing Democrats to impeach Trump Republicans plot comeback in New Jersey 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.

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 John TrumpTrump pushes back on recent polling data, says internal numbers are 'strongest we've had so far' Illinois state lawmaker apologizes for photos depicting mock assassination of Trump Scaramucci assembling team of former Cabinet members to speak out against Trump 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 Obama3 real problems Republicans need to address to win in 2020 Obama's high school basketball jersey sells for 0,000 at auction Dirty little wars and the law: Did Osama bin Laden win? MORE and former Vice President Joe BidenJoe BidenEight Democratic presidential hopefuls to appear in CNN climate town hall Hill Reporter Rafael Bernal: Biden tries to salvage Latino Support Biden, Buttigieg bypassing Democratic delegate meeting: report MORE stumped for Rosen in Nevada earlier this month. Obama has not visited Arizona, but has endorsed Sinema.