(NEWS CENTER Maine) -- In the most expensive Congressional race in the country, the winner will be decided by ranked-choice voting, and the Secretary of State begins that process Saturday.

According to the Secretary of State's office, none of the CD2 candidates won with a majority of the ballots cast. The numbers from the Secretary of State's office on Wednesday show that Bruce Poliquin leads Jared Golden by just 668 votes.

RELATED: Maine Secretary of State's office confirms: CD2 race will be decided by ranked-choice voting

The first step in RCV is to eliminate the candidate with the least amount of first place votes and look at who they voted for as their second choice.

The Maine Secretary of State explains how the process works in this video:

According to vote totals from the Secretary of State's office, even if every person who voted for Will Hoar all picked the same candidate as their second choice -- still, no one ends up with the majority.

So clerks move to next round, looking at the second choice votes for Tiffany Bond.

LISTEN: 1-on-1 with Tiffany Bond about the CD2 race and ranked-choice voting

“Secretary of State Department staff members must log, unlock and unseal each ballot box from hand count towns to scan the ballots using a high-speed tabulator; and log, unseal and upload all the memory devices from tabulator towns and cities before loading all the votes into the results program and then certifying the results to ensure accuracy," communications director for the Sec. of State's office Kristen Muszynski wrote in a press release.

Voters are not required to pick more than one candidate when voting, even when using ranked-choice: someone can vote for one candidate, Will Hoar, for example, and not make a second, third, or fourth choice.

If the total votes do not bring a candidate to a majority, the candidate with the most votes at the end wins.