Democrat Aftab Pureval appears to be making headway in his bid to unseat U.S. Rep. Steve Chabot, according to one of the nation's leading political publications.

Sabato's Crystal Ball, a weekly online report published by the University of Virginia's Center for Politics, listed 17 congressional districts in Tuesday's edition that appear to be moving toward Democratic candidates.

Chabot's 1st Congressional District is one of them. Previously, the Crystal Ball listed Ohio's 1st District as "Leans Republican." It is now listed as a "Toss Up."

Sabato's Crystal Ball ratings move OH-1 race between Chabot and Pureval from "Leans Republican" to "Toss Up." — Howard Wilkinson (@howardwilkinson) July 24, 2018

The district includes much of western Hamilton County and all of Warren County. Chabot has been in Congress since 1995, except for a two-year period from 2009 to 2011.

Pureval seemingly came out of nowhere in 2016 to win an upset victory against incumbent Republican Tracy Winkler for Hamilton County Clerk of Courts.

In January of this year, Pureval announced he would take on Chabot and several other potential Democratic candidates dropped by the wayside. The Chabot-Pureval campaign has been targeted by the Democratic Congressional Campaign Committee.

A second Ohio race – an Aug. 7 special election in Ohio's 12th District – has been moved from "Leans Republican" to "Toss Up" as well. Danny O'Connor is the Democrat running in the central Ohio district. His opponent is Troy Balderson, who recently won the endorsement of President Donald Trump. They are running to replace former congressman Pat Tiberi, who resigned earlier this year.

Troy Balderson of Ohio is running for Congress against a Nancy Pelosi Liberal who is WEAK on Crime & Borders. Troy is the total opposite, and loves our Military, Vets & 2nd Amendment. EARLY VOTING just started with Election Day on August 7th. Troy has my Full & Total Endorsement! — Donald J. Trump (@realDonaldTrump) July 21, 2018

Kyle Kondik, an Ohioan who is managing editor of the Crystal Ball, pointed out that Pureval raised more than double what Chabot raised in the most recent quarter of 2018 "and is approaching the long-time incumbent's cash-on-hand total.

You can read more from Sabato's Crystal Ball here.