Poll: Race to Replace Jeff Flake Tight in Ariz.

Democrat Rep. Kyrsten Sinema is backed by 48 percent of likely voters in the Arizona Senate race, while GOP Rep. Martha McSally is favored by 45 percent, a new NBC News/Marist poll reveals.

Sinema's lead falls within the poll's 4.7-point margin of error. And when Green Party candidate Angela Green is included, Sinema's lead shrinks to 2 percentage points.

Here are highlights from the Arizona poll:

• 46 percent have a favorable view of Sinema, while 33 percent see her unfavorably.
• 40 percent have a positive view of McSally, compared to 42 percent who see her unfavorably.
• 44 percent of those polled in Arizona approve of the job President Donald Trump is doing, compared to 51 percent who disapprove.

The winner of the contest will replace Sen. Jeff Flake, a Republican, who is retiring in January.

The poll, conducted Sept. 16-20, surveyed 950 likely voters in Arizona.

• Trump: Arizona's McSally 'Has My Total and Complete Endorsement!'
• McSally: 'Want a Protester in a Tutu or a Patriot in a Flight Suit?