Polls have now closed across Illinois, where we'll be monitoring several U.S. House primaries, as well as a closely-watched referendum in Chicago. Rep. Mike Bost is facing a challenge from his right, while Rep. Danny Davis is facing one from his left.

—Cooper Burton, 538

The first votes for Ohio's 9th Congressional District are rolling in, and with 13 percent of the expected vote reporting, Merrin is slightly ahead with 46 percent of the vote, while Riedel is second with 39 percent, and Lankeneau is a distant third (14 percent). As Nathaniel wrote earlier, Merrin was a late addition to the contentious race after audio leaked of Riedel calling Trump "arrogant." And as I wrote earlier, Merrin is no stranger to intra-Republican battles.

—Monica Potts, 538

As we wait for the first results to trickle in, let's take a look at the issues voters are thinking about in the state. Among likely primary voters in Ohio, Republicans are much more concerned about immigration than Democrats, according to a poll released last week by Emerson College/The Hill/Nexstar. Specifically, given a list of options, 27 percent of voters who said they were very likely to vote in the Republican primary selected "immigration" as the most important issue facing Ohio, while only 2 percent of very likely Democratic primary voters said the same.

Republican primary voters were also more likely than Democratic primary voters to name "the economy (jobs, inflation, taxes)" as the most important issue facing the state, 39 percent to 27 percent. On the flip side, likely Democratic primary voters were more likely than Republicans to select "abortion access," 15 percent to 3 percent, and "threats to democracy," 18 percent to 7 percent.

—Mary Radcliffe, 538

Polls have now closed across Ohio. The Buckeye State usually counts its early and mail votes first, so expect to see some large vote dumps right off the bat. A word of caution, though: Early and absentee votes are not necessarily representative of the electorate as a whole. We'll want to wait to get more Election Day votes in before drawing any concrete conclusions.

—Cooper Burton, 538

One under-the-radar race today is the Republican primary in Ohio’s 2nd District, which is tantamount to that seat’s general election given how red this seat is. Eleven Republicans are vying to replace retiring Rep. Brad Wenstrup, but three businessmen have used their wallets to stand out from the crowd. Concrete business owner David Taylor has loaned his own campaign $1.7 million, while Larry Kidd, who owns a hiring agency, has invested $1.3 million in the race. Meanwhile, Dunkin’ Donuts and LaRosa’s Pizzeria franchisee Tim O’Hara has spun up the third-most dough after self-funding $1.2 million.

Two state legislators are also running. State Sen. Niraj Antani has raised a respectable $671,000, but his district doesn’t overlap at all with the 2nd District, according to Daily Kos. State Sen. Shane Wilkin, by contrast, already represents 33 percent of the 2nd District, but he has raised only $146,000. If we had to pick a favorite here, it would probably be Taylor given that he has the most money and he’s the only major candidate from Clermont County, by far the most vote-rich county in the district. There are no runoffs in Ohio, so whoever finishes first in the primary will become the nominee even if they win just a bare plurality.

—Nathaniel Rakich, 538