Midterm indicators to watch

Voters in Indiana and Kentucky will see results during the 6 p.m. Eastern Time hour on Tuesday.

These early returns will offer the first signals regarding Republican turnout and Latino voting patterns. Florida, which spans two time zones, will follow with House race results in the 7 p.m. Eastern Time hour. Statewide contests in Florida, including the Senate and governor races, may not be called until 8 p.m. Eastern Time. Watchers should monitor Indiana's 5th District and Kentucky's 6th District. Both seats are currently held by Republicans but have become more competitive this cycle. Close results or Democratic wins in these areas could indicate lower Republican turnout. Florida's 22nd District, held by a Democrat but redrawn to favor Republicans, and the 27th District, a heavily Latino area where Donald Trump won by double digits in 2024, will provide further clues.

The share of independent voters supporting Republicans serves as a key benchmark. During the Trump era, Republicans have historically lost elections when they failed to secure at least 46 percent of this group. This threshold is lower than in the past, reflecting a political shift where blue-collar white voters have trended toward Trump while better-educated white voters have moved toward the Democrats. Independents have a lower propensity to vote in midterm elections compared to presidential cycles.

Black voter turnout in Wayne County, Michigan, will determine the outcome of the state Senate race. This contest is critical for control of the U.S. Senate. If Republicans flip the seat, Democrats must win five seats currently held by Republicans to take majority control. Abdul El-Sayed needs strong support in and around Detroit to win. Democrats have typically required 68 percent or more of the vote in Wayne County to win Michigan, unless they overperform in suburban areas. In 2024, Sen. Elissa Slotkin won with 63 percent in the county, but Vice President Kamala Harris lost with 62 percent.

Young voters aged 18 to 29 have seen a sharp drop in midterm turnout compared to presidential elections. Since 1992, 43 percent of registered young voters participated in presidential races, but that figure falls to 21 percent in midterms. Democrats have generally performed well when they win this demographic by more than 20 points. In 2022, Democrats won young voters by 28 points, which helped limit Republican gains despite losing the House.

In Texas, the difference between the vote totals for Gov. Greg Abbott and Attorney General Ken Paxton will be a key indicator for Senate candidate James Talarico. No Democrat has won a statewide office in Texas since 1994. In 2018, Ted Cruz won the Senate seat by more than 200,000 votes, even though he received about 400,000 fewer votes than Abbott. Analysts suggest Talarico needs the gap between Abbott and Paxton to exceed 400,000 votes. Talarico must also improve on the 2018 Latino vote share in South Texas counties, including Cameron, Hidalgo, Webb, and Nueces.

Exit poll data on party identification will reveal the scale of the Democratic base. The percentage of voters identifying as Democrats hit a low of 31 percent in 2024, down from 39 percent in 2008 and 2010. Recent polling shows high enthusiasm among Democrats, with 53 percent of likely voters strongly disapproving of Trump's job performance. This opposition may unify the party. The Michigan Senate race and the contest for Michigan's 7th Congressional District will test whether progressive candidates can win in purple districts, a factor that could shape the 2028 presidential primary.