The only Democrat who filed papers to challenge Sen. Tom Cotton Tom Bryant CottonThe Hill's 12:30 Report: Trump stokes fears over November election outcome The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Abortion stirs GOP tensions in Supreme Court fight MORE (R-Ark.) next year abruptly ended his campaign on Tuesday just hours after the filing deadline passed.

In a statement posted to Facebook and Twitter, Democratic candidate Josh Mahony said an unspecified “family health concern” meant he could no longer devote the time needed to run a competitive campaign.

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“It has been the honor of my life to be able to meet and visit with so many Arkansans over the last six months and hear their voices,” Mahony said in the statement. “It was my sincere hope to be their advocate in Washington, D.C. However, in this moment right now, I need to focus on my family and place their interests first.”

Mahony, a nonprofit executive in Fayetteville, was mounting his second bid for public office. He lost a 2018 run against Rep. Steve Womack Stephen (Steve) Allen WomackEx-CBO director calls for more than trillion in coronavirus stimulus spending Overnight Defense: Lawmakers tear into Pentagon over .8B for border wall | Dems offer bill to reverse Trump on wall funding | Senators urge UN to restore Iran sanctions Lawmakers trade insults over Trump budget cuts MORE (R-Ark.) by an almost 2-to-1 margin. And his odds against Cotton were not good: Cotton won office in 2014 with 57 percent of the vote, easily defeating former Sen. Mark Pryor Mark Lunsford PryorCoronavirus poses risks for Trump in 2020 Tom Cotton's only Democratic rival quits race in Arkansas Medicaid rollback looms for GOP senators in 2020 MORE (D-Ark.).

But Mahony had raised about $250,000, according to campaign finance reports made to the Federal Election Commission last month. Those reports showed Mahony ended September with $25,000 in the bank.

No other Democrat had filed to challenge Cotton by Tuesday’s midday deadline. Cotton still faces Ricky Harrington, a Libertarian candidate who works for the state corrections department, and Dan Whitfield, who calls himself a progressive independent.

The state Democratic Party told local media outlets it is working with the Secretary of State’s office to figure out whether and how it can get a replacement candidate on the ballot. Michael John Gray, the Democratic chairman, told the Arkansas Democrat Gazette he learned of Mahony’s exit when someone told him about the tweet.