Five numbers to watch as midterms unfold

Voters in Indiana, Kentucky, and Florida will see early House results in the evening, offering first signals of the national trend. Watchers should focus on five specific metrics that will determine party control of Congress.

In Michigan, the Senate race turns on turnout in Wayne County. Democratic candidate Abdul El-Sayed needs a margin of at least 68% with Black voters in that area to secure a win, unless he outperforms in the suburbs. In 2024, Elissa Slotkin won with a 63% margin, while Kamala Harris lost with 62%. The 2020 and 2018 cycles both saw margins of 68% or higher.

Texas presents a complex calculation for Democrat James Talarico. He must beat the vote total of Republican Governor Greg Abbott, who is considered stronger than Attorney General Ken Paxton. In 2018, Ted Cruz won the Senate seat by 200,000 votes despite receiving 400,000 fewer votes than Abbott. Talarico also needs to outperform Beto O'Rourke's 2018 Latino vote shares in South Texas counties, specifically Cameron, Hidalgo, Webb, and Nueces.

Florida's 27th Congressional District offers a gauge for Latino voter behavior. Donald Trump won this district by double digits in the 2024 presidential election. A drop in that margin could indicate a shift in this key subgroup. Meanwhile, Indiana's 5th and Kentucky's 6th Districts will signal Republican turnout levels.

Independents and young voters will decide the final margin. Republicans have won midterms when capturing at least 46% of independents since 2016. Young voters aged 18 to 29 turn out at 21% in midterms, down from 43% in presidential years. Democrats have fared well when winning this age group by more than 20 points.

Party identification rates have shifted over the last decade. Democrats fell to 31% of the electorate in 2024, the lowest point in recent history, down from 39% in 2008 and 2010. However, 53% of likely voters strongly disapprove of President Trump's performance according to the latest NPR poll. This opposition may unify the left as progressive candidates race in Michigan's Senate and 7th Congressional District contests.