Election Day turnout appeared to be heavy in Arizona on Tuesday as voters cast ballots in a competitive Senate race. The state is also rated as one of the most competitive battleground states in this year’s presidential election.

Election officials say it could take up to 13 days for results to be tabulated in the state. In addition to high turnout, voters also need to decide on a large number of races. In Maricopa, the state’s most populous county, the ballot measure is two pages long.

RELATED STORY | Harris and Trump make final remarks to country before heading to election watch parties

Election officials expect that about an hour after the polls close, they will have about 70% of the results of the more than a million people who voted at the beginning of this election.

Officials also expect record turnout in Maricopa County. It is one of the largest voting jurisdictions in the United States, with more than 2.6 million registered voters. The county opened a record 246 precincts on Tuesday.

Polls have shown the race between former President Donald Trump and Vice President Kamala Harris to be neck-and-neck. At least one voter in Arizona went to the polls without knowing who he would vote for.

“I came here undecided to be honest with you. I think my vote is for Donald Trump, but I’m still thinking about it this morning, to be honest,” said first-time voter Jeremy Hernandez.

RELATED STORY | Here are some tips to help you cope with anxiety as election results come in

After voting, he said he would vote for Trump.

“Given his past experience as president and not destroying the country, I think he’s done a pretty good job. I think he understands people,” he said.

Meanwhile, the state’s open U.S. Senate seat is up for grabs, with Democrat Ruben Gallego holding a slight lead in polls for Republican Karl Lake.