Montana Lt. Gov. John Walsh (D) released his military records, pushing back on attacks from the Senate candidate's opponents on his service.

Walsh is the front-runner and establishment favorite for the nomination to replace retiring Sen. Max BaucusMax Sieben BaucusFarmers hit Trump on trade in new ad Feinstein’s trouble underlines Democratic Party’s shift to left 2020 Dems pose a big dilemma for Schumer MORE (D-Mont.).

He has faced accusations that he improperly used his position as an adjutant general in the Montana National Guard to support a veterans' group that advocates for better equipment for armed services members, accusations that included reports of a 2010 Army investigation that reprimanded him for pressuring lower-ranked soldiers to support the group.

"I've been with my soldiers when they've been fired upon and when they've been taken off the field on stretchers," Walsh said Sunday at a news conference at his campaign headquarters in downtown Helena, according to the Missoulian.

"It's because of them, and all American heroes, that I will never stop fighting to ensure that they receive the best equipment and training available."

Walsh is facing an uphill race against Rep. Steve DainesSteven (Steve) David DainesOvernight Defense: Senate sides with Trump on military role in Yemen | Dem vets push for new war authorization on Iraq anniversary | General says time isn't 'right' for space corps Senate sides with Trump on providing Saudi military support Overnight Tech: Ivanka Trump gives boost for anti-sex trafficking bill | GOP senators push to keep online sales tax out of omnibus | How James O'Keefe operatives tried to trick tech employees MORE (R-Mont.) and has a primary opponent as well, so negative stories about his military service — the strongest part of his campaign biography — could erode his chances of keeping the seat in Democratic hands.