Democrats need at least 50 seats to keep control of the Senate with Vice President Kamala Harris giving them the tie-breaking vote for a majority, while Republicans need 51 to gain control. Of the 35 seats on the ballot this year, Republicans are currently favored to win 20 seats, while Democrats are favored to win 12 seats. 3 seats are rated as toss-ups.

Seats up for election

To control the US House of Representatives, a party must hold 218 out of 435 seats. Republicans are currently favored to win 211 seats this November, while Democrats are favored to win 205 seats. 19 seats are currently rated as toss-ups.

Seats up for election

Republicans hope to take Arizona back after Democrats made inroads in the swing state in 2020 when Biden won the state and Mark Kelly flipped a Senate seat for Democrats.

However, the GOP isn’t putting up moderate Republicans to help that cause. Republican gubernatorial nominee Kari Lake and GOP Senate nominee Blake Masters were both endorsed by Trump and have expressed skepticism that Biden legitimately won the state.

A large voting bloc in Arizona that could end up deciding these close races are Latinos, who represented 19% of the Arizona electorate in 2020, according to exit polls. This key voting bloc broke for Biden, who won 61% of the Latino vote, compared to Trump’s 37%.

Democrats will need to perform well in Maricopa County to hold onto their Senate seat and flip the governorship. The county, which includes Phoenix, is home to a majority of Arizona’s registered voters. Largely white collar and home to a sizable high-tech economy, the county has historically leaned Republican, but has been drifting towards Democrats in recent years.

All eyes in Michigan will be on the state’s gubernatorial race as Democratic Gov. Gretchen Whitmer faces conservative commentator Tudor Dixon, who’s hoping her Trump endorsement will help turn the state back towards Republicans.

The right to abortion will also be on the ballot. Democrats hope the issue will help boost turnout among their base voters.

Voting and elections will also be key issues, as Michigan voters will decide on a ballot measure to expand access to the ballot, and elect a new secretary of state. Incumbent Democrat Jocelyn Benson faces Republican Kristina Karamo, who has backed Trump’s lies about the 2020 election.

To keep Michigan blue, Democrats will have to do well in the Detroit-area counties, as well as run up the score in more Democratic-friendly parts of the state like Ann Arbor and Lansing.

Republicans will likely do well in the western and northern parts of the state and will try to drum up more support in the historically conservative area around Grand Rapids, which has become more Democratic in recent years.

As Nevada tries to recover from a pandemic downturn that hit the tourism industry especially hard, Sen. Catherine Cortez Masto and Gov. Steve Sisolak are among the Democratic party’s most vulnerable incumbents.

Cortez Masto faces a challenge from former state Attorney General Adam Laxalt, who despite losing a bid for governor in 2018, won statewide in 2014. Sisolak is running against Joe Lombardo, the sheriff of the state’s largest county.

Democracy is also on the ballot, as Republican Jim Marchant, who has cast doubt on the 2020 election, seeks to run Nevada’s elections as secretary of state.

Republican candidates ordinarily run best in the state’s more sparsely populated rural counties. Statewide races are usually won or lost, however, in Democratic-leaning Las Vegas and the surrounding communities of Clark County.

The state that put Biden over the top in 2020 will be home to some of the most important Senate and gubernatorial races in the country this year.

Republicans are hoping to hold on to an open Senate seat with former TV personality Mehmet Oz, while Lt. Gov. John Fetterman is hoping his nontraditional appeal can help him move the seat into the Democrats’ column.

State Attorney General Josh Shapiro is trying to maintain Democratic control of Pennsylvania’s governorship in a race that has taken on added importance because the governor appoints the official responsible for elections. Shapiro’s opponent is Republican state Sen. Doug Mastriano, who was a central figure supporting Trump’s efforts to overturn the 2020 election.

The Democratic base in Pennsylvania resides in urban Philadelphia and Pittsburgh while Republicans run up the score in the more rural central portion of the state. The Philadelphia suburbs have been moving towards Democrats while Republicans have improved in the western and northeastern parts of the state.

Wisconsin is one of the most closely divided states in the nation, and GOP Sen. Ron Johnson and Democratic Gov. Tony Evers both face highly competitive reelection campaigns.

Johnson, who has a history of controversial statements about the pandemic and the Jan. 6 attack, is facing Democratic Lt. Gov. Mandela Barnes, who at one point signaled support for removing police funding.

Evers faces Republican businessman Tim Michels, who won Trump’s support in the primary by aggressively amplifying the former president’s 2020 election lies.

Democrats receive the most support from historically blue-collar Milwaukee and the capital of Madison. The GOP base is found in the more affluent northern and western suburbs of Milwaukee, as well as in less populated counties in central Wisconsin.