Poll: Kelly opens up double-digit lead against McSally in Arizona Senate race

Democratic Senate candidate Mark Kelly (D) has a 12-point lead over Sen. Martha McSallyMartha Elizabeth McSallyTrump: GOP senators who don't embrace him will 'lose their elections' McConnell warns control of Senate 'could go either way' in November The Hill's Campaign Report: Biden picks Harris as running mate MORE (R-Ariz.) in the Arizona Senate race, according to a Univision poll released Friday

Kelly, a former astronaut, is challenging McSally, who lost the general election in 2018 to Sen. Kyrsten Sinema (D). McSally was later appointed to the Senate to succeed interim Sen. Jon Kyl (R), who filled Sen. John McCainJohn Sidney McCainDemocrats hammer Trump for entertaining false birther theory about Harris Trump rips Bill Maher as 'exhausted, gaunt and weak' The Hill's Morning Report - Presented by Facebook - The choice: Biden-Harris vs. Trump-Pence MORE's (R) seat following his death in 2018.

In the Univision poll, Kelly earned 48 percent support among registered voters, while McSally earned 36 percent support. Kelly polled significantly better than his opponent among Latino and black voters. 

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However, the Univision poll isn't the first sign of an uphill battle for McSally. A poll released earlier this week by OH Predictive Insights, a Phoenix-based polling firm, showed Kelly with 49 percent support among Arizona voters, compared with 42 percent for McSally.

Arizona, a key state that went to President TrumpDonald John TrumpUSPS warns Pennsylvania mail-in ballots may not be delivered in time to be counted Michael Cohen book accuses Trump of corruption, fraud Trump requests mail-in ballot for Florida congressional primary MORE in 2016, also appears to be leaning Democratic in the lead up to the 2020 presidential election. 

When given the choice between former Vice President Joe BidenJoe BidenHarris to host virtual Hollywood campaign event co-chaired by Reese Witherspoon, Mindy Kaling Trump plans to accept Republican nomination from White House lawn US seizes four vessels loaded with Iranian fuel MORE and Trump, 50 percent of respondents chose Biden and 42 percent chose Trump. In a head-to-head against Sen. Bernie SandersBernie SandersChris Wallace: Trump struggling with attacks on 'shape-shifter' Harris Kamala Harris: The outreach Latinos need Biden and Harris seen as more moderate than Trump and Pence: poll MORE (I-Vt.), the other Democratic presidential front-runner, 48 percent chose the Vermont senator over the president.

Both Biden and Sanders received support from more than 60 percent of Latinos and more than 70 percent of black voters.

When given the option to chose between Trump and whomever wins the Democratic nomination, 51 percent of voters said they would support the Democratic nominee and 41 percent supported Trump.

The poll surveyed 1,036 likely voters in Arizona and has a 3 percent margin of error.