Arizona GOP Senate nominee Masters now deadlocked with Democrat incumbent Kelly: poll

Blake Masters, Arizona's Republican nominee for Senate, is 3 points behind Democratic Sen. Mark Kelly, placing him within the margin of error, according to a poll.

Masters, who was endorsed by former President Donald Trump, comes in at 48% with Kelly at 51%, a CBS News/YouGov Battleground Tracker survey from last week shows.

The poll was conducted with 1,164 registered Arizona voters from Sept. 30-Oct. 4, and the margin of error is 3.8 points, meaning that Masters may have an edge over Kelly one month before the midterm election.

Half of all Kelly voters said they support the senator because they "like him," compared to 21% of Masters voters who said that is why they are supporting the GOP nominee. Opposition to Kelly seems to be a much stronger motivator for Masters voters as 48% said they are voting for the Republican "to oppose the other candidate," compared to 31% of Kelly voters who said the same.