Republican Gov. Joe Lombardo and Democratic Attorney General Aaron Ford are locked in a dead heat in a potential race for Nevada governor, a poll released Friday found.

Emerson College found Lombardo and Ford tied at 41 percent, with 18 percent of respondents undecided. The poll was conducted earlier this week and has a margin of error of +/- 3.4 percent.

The survey also found Lombardo’s approval rating to be slightly underwater, with 34 percent of respondents approving of his job performance and 36 percent disapproving. However, more respondents than not had a favorable opinion of Lombardo as a person.

Ford was also above water in personal likability metrics, though about 40 percent of respondents did not have an opinion on him or had not heard of him before.

The poll did not test Lombardo’s strength against any other gubernatorial candidates. Washoe County Commissioner Alexis Hill is running against Ford in the Democratic primary. Riley Sutton, Hill’s campaign manager, said in a statement that it is “disappointing, but not surprising, that an outsider candidate would not be included in an establishment poll,” and that “people are sick of the establishment and they want change.”

The survey shows the razor-thin margins of the potential race with the general election less than one year away. An October poll found Lombardo up 3 points over Ford (within the margin of error), while election forecasters have rated the race as anywhere from “lean Republican” to “toss-up.”

Notably, the poll found President Donald Trump — who became the first Republican presidential candidate in 20 years to win Nevada last year — 15 points underwater. Trump endorsed Lombardo for governor earlier this month.

It also reinforces previous findings about the issues that matter most to Nevadans, with about 40 percent of respondents stating the most important issue is the economy. The survey did not test Lombardo and Ford’s approval ratings on specific issues, but Trump had a -22 net approval rating on the economy, according to the poll.

Ford recently traveled the state on a “Working Class First” tour, while Lombardo has focused his campaign so far on his record the past two years, including raises for teachers, more accountability of schools and efforts to increase “attainable” housing geared toward middle-income earners statewide.

In a statement Friday, Tai Sims, a spokesperson for Ford’s campaign, criticized Lombardo over the state’s high unemployment rate and costs.

“[I]nstead of prioritizing working families, Lombardo has been cheerleader-in-chief for Trump’s price-raising agenda,” the statement said. “Ford is a bipartisan problem solver who has a proven track record of creating good-paying jobs and fighting to lower costs.”

Lombardo’s campaign did not immediately provide comment.

The second most important issue to voters was immigration at 16 percent. Trump was 12 points underwater on the issue.

Immigration is a contentious topic between Lombardo and Ford. 

Republicans have attacked Ford for initially supporting a bill in 2017 that would have barred local police departments from using resources for immigration enforcement. Ford has maintained he doesn’t support sanctuary policies for criminals, but debate reignited this year after his office released a set of legislatively mandated, nonbinding “model immigration policies” that provide guidance on how agencies can respond to immigration enforcement in settings ranging from hospitals to federal courthouses.

Read more: In Nevada governor’s race, finger-pointing over ‘sanctuary’ status takes center stage

Meanwhile, Lombardo signed an agreement with the U.S. Department of Justice earlier this year aimed at showing Nevada is cooperating with federal immigration enforcement efforts after the state was labeled a "sanctuary.” The agreement pledges to use the Nevada National Guard to provide administrative support in immigration enforcement operations as necessary. It also requires the state to use certain federal emergency management funds to support partnerships between federal immigration officials and Nevada law enforcement.