Democratic incumbent Joe Donnelly trails Republican challenger Mike Braun in their battle for a U.S. Senate seat from Indiana, according to poll results released Tuesday by Axios and SurveyMonkey.
Braun is preferred by 49 percent of registered voters and Donnelly by 47 percent in polling conducted from June 11 to July 2.
Donnelly has gained ground, however. In an Axios/SurveyMonkey poll conducted in February and March, 51 percent of voters favored a generic Republican candidate and 45 percent preferred Donnelly. The GOP nominated Braun in the May primary election.
In the earlier survey, five Democratic senators were running behind. The latest poll has three behind: Donnelly and Sens. Bill Nelson of Florida and Heidi Heitkamp of North Dakota.
But four months from the general election, "It's looking nearly impossible for Democrats to take back the Senate," Axios' Alexi McCammond wrote.
Republicans have a 51-49 edge in the chamber. Democratic incumbents must retain all 10 of their seats in states carried by President Donald Trump in 2016 and pick up two more seats to grab the majority, McCammond wrote. "That's not happening," she wrote, even though Democratic candidates are leading in polls for races in Arizona and Nevada.