Brian Fallon, former press secretary for Hillary Clinton's 2016 campaign, warned against being "distracted" by White House chief of staff and retired four-star general John Kelly's military service background record, after Kelly defended Trump's outreach to Gold Star families Thursday.

"Kelly isnt just an enabler of Trump. He's a believer in him. That makes him as odious as the rest. Dont be distracted by the uniform," Fallon tweeted Thursday.

Fallon also condemned Kelly's role in advancing Trump's agenda when he was Department of Homeland Security Secretary earlier in 2017.

"Before Kelly was Chief of Staff, he was the DHS secretary defending Trump's travel ban and overseeing mass deportations," Fallon said minutes later in a separate tweet.

Kelly, whose son was killed in Afghanistan in 2010, defended Trump on Thursday and condemned Rep. Frederica Wilson for politicizing the phone call between Trump and a Gold Star widow of a soldier who died serving in Niger, saying the president was insensitive.

"There's no perfect way to make that phone call. When I took this job and talked to President Trump about how to do it, my first recommendation was to not do it, because it's not the phone call that parents, family members are looking forward to," Kelly told reporters at the White House.

"It stuns me that a member of Congress would have listened in on that conversation," he added. "I thought at least that was sacred."

Four U.S. Army Special Forces were killed during an ambush of a joint patrol of U.S. and Nigerien forces along the Niger-Mali border in early October. The president faced criticism after two weeks passed and he hadn't reached out to the families.

The White House announced on Tuesday that Trump finally did speak over the phone with all four of the families of the soldiers killed in Niger.