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Poll: Democrat Mark Kelly leads incumbent McSally in Arizona Senate race

Democratic candidate Mark KellyMark KellyDemocrats facing tough reelections back bipartisan infrastructure deal Centrists gain foothold in infrastructure talks; cyber attacks at center of Biden-Putin meeting Centrists gain leverage over progressives in Senate infrastructure battle MORE is leading Republican Sen. Martha McSallyMartha Elizabeth McSallyDemocrats facing tough reelections back bipartisan infrastructure deal McGuire unveils Arizona Senate campaign On The Trail: Arizona is microcosm of battle for the GOP MORE among Arizona voters, according to a new poll. 

Kelly, a former astronaut and U.S. Navy captain, has a 4-point lead over the incumbent Republican, according to a poll by the left-leaning Public Policy Polling

The survey found that 46 percent of polled voters said they would vote for Kelly and 42 percent said they would vote for McSally. An additional 12 percent said they were not sure. 

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Kelly is married to former Rep. Gabby Giffords (D-Ariz.), who has been a prominent gun control advocate since retiring from Congress after surviving an assassination attempt in 2012.

Democrats are looking to flip at least three Senate seats in 2020 to take control of the upper chamber. 

McSally is one of a few vulnerable targets. The Cook Political report ranks the race as a “toss-up.” 

McSally was appointed to her seat last year after it was vacated following the death of Republican Sen. John McCainJohn Sidney McCainOvernight Energy: Lake Mead's decline points to scary water future in West | White House leads opposition to raising gas tax | Biden taps ex-New Mexico lawmaker for USDA post Lake Mead's decline points to scary water future in West Five takeaways from the Biden-Putin summit MORE. She had lost her Senate bid in 2018 to Democrat Kyrsten Sinema, who flipped the seat formerly held by retired Republican Sen. Jeff FlakeJeffrey (Jeff) Lane FlakeOn The Trail: Arizona is microcosm of battle for the GOP Trump looms large over fractured Arizona GOP Why Republican politicians are sticking with Trump MORE.

The Public Policy Polling survey polled 760 Arizona voters between Jan. 2 and Jan. 4. There is a margin of error of 3.6 percentage points.