Kelly holds double-digit lead over McSally in Arizona: poll

Democrat Mark Kelly has a double-digit lead over Sen. Martha McSallyMartha Elizabeth McSallyHealth care group launches M ad campaign hitting Trump in battleground states Senate outlook slides for GOP ACLU calls on Congress to approve COVID-19 testing for immigrants MORE (R) among Arizona voters, according to a Fox News poll released Wednesday.

Half of surveyed Arizona voters said they would vote for Kelly, while 37 percent said they would vote for McSally. 

Kelly, a gun control advocate and retired astronaut, is backed by an overwhelming 88 percent of Democrats, according to the poll. Additionally, 42 percent of independents and even 15 percent of Republicans said they would vote for Kelly. 

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McSally has the support of 73 percent of Republicans, based on the poll, but just 27 percent of independents. Only 3 percent of Democrats, within the poll’s margin of error, said they would vote for the Republican senator in November. 

McSally's is one of the most vulnerable GOP-held Senate seats in the 2020 race. 

McSally lost a race in 2018 to Sen. Kyrsten Sinema (D), who flipped the seat that had been held by Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeCheney clashes with Trump Sessions-Tuberville Senate runoff heats up in Alabama GOP lawmakers stick to Trump amid new criticism MORE (R). McSally was later appointed to a vacant seat following the death of Sen. John McCainJohn Sidney McCain Senate outlook slides for GOP Juan Williams: Time for boldness from Biden Democrats lead in three battleground Senate races: poll MORE (R). 

Kelly is married to former Rep. Gabby Giffords (D-Ariz.), who resigned in 2012 after surviving an attempted assassination. 

The same Fox News poll found that presumptive Democratic presidential nominee Joe BidenJoe BidenTucker Carlson ratchets up criticism of Duckworth, calls her a 'coward' Joe Biden wins New Jersey primary Biden wins Delaware primary MORE has a slim 4-point lead over President TrumpDonald John TrumpNew Jersey incumbents steamroll progressive challengers in primaries Tucker Carlson ratchets up criticism of Duckworth, calls her a 'coward' Trump on Confederate flag: 'It's freedom of speech' MORE in the key battleground state. 

The poll is based on a survey of 1,002 Arizona voters and was conducted May 30 to June 2. The margin of error is 3 percentage points.