Election Day is here and voters across the U.S. are heading to the polls to vote in their state's gubernatorial election.

36 governors' seats are up for election in 2022: 20 of those seats are held by Republicans and 16 are held by Democrats.

Incumbent Democrats are playing defense this year: Republicans could flip as many as four gubernatorial seats this cycle.

Here's a look at five of the most competitive gubernatorial races in the 2022 midterms.

1. Wisconsin Gov. Tony Evers could lose re-election this year after flipping the governor's mansion in 2018.

Evers is the second-most vulnerable Democratic incumbent this cycle: the race is in a "dead heat," per FiveThirtyEight.

According to FiveThirtyEight's poll average, Republican Tim Michels is leading Evers by 0.4 points in the polls.

Could Michels win? It's likely: Wisconsin voted for Biden in 2020 by 20K+ votes and Evers in 2018 by 29K+ votes.

2. Kansas Gov. Laura Kelly will also be fighting for a second term after flipping her seat in 2018's blue wave.

According to Politico, Kelly is "Democrats' most vulnerable incumbent on the ballot this year."

Is that true? According to FiveThirtyEight's poll average, Kelly is leading GOP opponent Derek Schmidt by 5.1 points.

An Oct. Emerson College poll also showed Kelly leading Schmidt by five points among 1K+ likely voters.

Kelly still has an uphill battle on Election Day: Kansas is a deep-red state and voted for Trump by 14+ points in 2020.

3. In Oregon, Republicans are a polling error away from flipping the governor's mansion for the first time since 1982.

According to FiveThirtyEight's poll average, Republican Christine Drazan is trailing the polls by 3 points.

Leading Drazan is Democrat Tina Kotek with an average 44.9% support in statewide polls. (FiveThirtyEight)

What's behind Drazan's unlikely performance in Oregon? Democrats blame independent Betsy Johnson for splitting support.

Johnson has an average 8.4% support in statewide polls, per FiveThirtyEight. Kotek is "slightly favored" to win.

4. Nevada Gov. Steve Sisolak could lose re-election this year amid a red shift in the state.

Sisolak is the most vulnerable Democratic incumbent this cycle: an Oct. NYT poll showed him trailing by four points.

According to FiveThirtyEight's poll average, Republican Joe Lombardo is leading Sisolak by 1.9 points in the polls.

Lombardo could win this Nov.: per FiveThirtyEight's forecast, he's "slightly favored" with a 61 in 100 chance of winning.

5. In Arizona, Democrats are hoping to continue their streak and flip the governor's mansion this year.

Could they do it? According to FiveThirtyEight's poll average, Republican Kari Lake is leading the polls by 2.4 points.

The race is still a toss-up: an Oct. Marist College poll showed Democrat Katie Hobbs leading Lake by one point.