On Twitter, reporters and other media figures called into question how Trump helped, while others slammed the president for siding with a soldier found guilty of using a 12-year-old's corpse as a morbid trophy and photo prop.
The outcome delivered a major blow to one of the Navy's most high-profile war crimes cases and exposed a generational conflict within the ranks of the elite special operations forces.
A military jury sentenced a decorated Navy SEAL to four months of confinement for posing with the body of an Islamic State captive in Iraq, but a judge credited him with enough days to ensure he won't be locked up.
But Navy prosecutors said Gallagher's text messages, particularly the wording of "Got him with my hunting knife", was evidence of his admission to the murder. The sentence also carries a two-month forfeiture of his salary, a sum of almost $5,400.
The defence said Gallagher was framed by junior SEALs who fabricated the allegations to oust a chief who was tough on them. They included photos of Gallagher holding the dead militant up by the hair and clutching a knife in his other hand.
"I knew he was going to die anyway", Scott said.
During the trial, it was noted that seven members of Gallagher's own platoon leveled the accusations against him.
Some congressional Republicans and conservative commentators had rallied to Gallagher's defense amid speculation that Trump might pardon him if convicted.
Dow Average closes at record as Treasuries rally
Investors are now shifting their focus back on the Federal Reserve and its interest rate policy outlook for the year. But Australia's S&P ASX 200 advanced 0.5% to 6,689.10 and the Sensex in India edged 0.1% higher to 39,837.36.
A Navy SEAL who was acquitted of killing a wounded Islamic State captive but convicted of posing with the corpse told a military jury considering his punishment Wednesday that he has made "tactical, ethical, moral" mistakes but learned from them.
Trump may have been referencing a tweet he posted in March, when he announced that Gallagher would be moved to "less restrictive confinement" while awaiting trial, tagging his favorite cable news show "Fox and Friends" and Rep. Ralph Norman (R-SC) who has been outspoken in defense of Gallagher.
One platoon mate said he saw Mr Gallagher fatally stab the teenage IS militant. In Gallagher's case, that meant five of seven jurors.
Special Operator Edward Gallagher, who did not testify during his two-week court-martial, addressed the jurors a day after they acquitted him of murder, attempted murder and other counts stemming from an incident during a 2017 deployment to Iraq.
Gallagher was acquitted on all charges except for one on Monday.
Seven SEALs had said Gallagher, who was on his eighth deployment, suddenly stabbed the ISIS teen moments after he was treated by U.S. medics May 3, 2017, after being injured in an airstrike. Without a body, a forensic expert testifying as an expert witness was unable to determine the teen's cause of death based exclusively on video footage of the boy's injuries. The attorney claimed that the "millennial" platoon members hated Gallagher and wanted him to be punished, despite his innocence.
Most of the witnesses were granted immunity to protect them from being prosecuted for acts they described on the stand.
Lt. Jacob Portier, the officer in charge of the platoon, has been charged separately for overseeing Gallagher's re-enlistment ceremony next to the corpse and not reporting the alleged stabbing. He was cleared of six and found guilty of one.