Three Republican Senate candidates — Indiana's Mike Braun, North Dakota Rep. Kevin Cramer and Tennessee Rep. Marsha Blackburn — have slim leads in new Fox News polls, while two Democrats — Rep. Kyrsten Sinema (D-Ariz.) and Sen. Claire McCaskill (D-Mo.) — have small advantages in polls of their states.

Arizona


Democratic Rep. Kyrsten Sinema held a slim lead over Republican Rep. Martha McSally, 47 percent to 44 percent, with 8 percent undecided. Sinema benefited from some crossover vote, with 12 percent of Republicans supporting the Democratic congresswoman.

More than half of voters, 52 percent, viewed Sinema favorably and just 35 percent viewed her unfavorably. Slightly under half, 47 percent, viewed McSally favorably and 43 percent viewed the Republican unfavorably.

President Donald Trump's approval in the state was even: 49 percent of voters approve and 49 percent disapprove of the job he's doing.

Indiana


Republican Mike Braun held a slim lead over Democratic Sen. Joe Donnelly, 45 percent to 43 percent, with 8 percent undecided and 3 percent backing a libertarian candidate.

Both candidates' favorability was above water: 52 percent viewed Donnelly favorably compared to 39 percent unfavorably, while 47 percent viewed Braun favorably compared to 38 percent who viewed him unfavorably.

Trump remains popular in the state: 54 percent of likely voters approve of the job he's doing, compared to 44 percent who disapprove.

Missouri


Democratic Sen. Claire McCaskill held a slim lead over Republican Josh Hawley, 44 percent to 41 percent, with 6 percent supporting another candidate and 8 percent undecided.

McCaskill's favorable ratings are close to even, with 48 percent viewing her favorably and 49 percent unfavorably; Hawley is viewed favorably by 47 percent of voters, and unfavorably by 44 percent.

Trump's approval was also close to even: 49 percent of likely voters approve of the job he's doing, compared to 48 percent who disapprove.

North Dakota

Republican Rep. Kevin Cramer holds a lead over Democratic Sen. Heidi Heitkamp, 48 percent to 44 percent with 8 percent of voters undecided.

Heitkamp and Cramer are both well liked: 55 percent of likely voters view Cramer favorably, while 40 percent view him unfavorably. Meanwhile, 51 percent of likely voters view Heitkamp favorably and 45 percent view her unfavorably.

The president is still well-liked in North Dakota, with 54 percent approving of the job he's doing compared to 42 percent who disapprove.

Tennessee


Republican Rep. Marsha Blackburn leads former Democratic Gov. Phil Bredesen 47 percent to 44 percent, with 8 percent of voters undecided.

Both candidates are well liked: 54 percent of likely voters view Bredesen favorably compared to 36 percent who view him unfavorably; 51 percent view Blackburn favorably compared to 39 percent who view her unfavorably.

Trump's approval rating was well above water in the state, with 58 percent approving of the job he's doing compared to 38 percent who disapprove.