The Weekly Standard founder Bill Kristol said the president had "mocked" and "disparaged" a Gold Star family.
A bipartisan effort to repeal the so-called "military widow's tax" appears to be headed for success after it was included as a provision of the 2020 National Defense Authorization Act.
"They have no idea what service and sacrifice is," Gold Star father Khizr Khan said of the Trump family over the weekend.
Retired Navy veteran, Keith Sherman, has interviewed Gold Star families in all 50 states, which concluded in Massachusetts on Friday. These stories will be added to the Library of Congress in November.
"It's a matter of priorities."
Dillon Baldridge was shot and killed along with two other soldiers in Afghanistan.
Forty-three people have died in military service this year, and just nine families have confirmed they've heard from President Donald Trump.
Rep. Frederica Wilson's staff have reported multiple threatening phone calls in row over president's treatment of dead soldier's widow.
Cowanda Jones-Johnson told The Washington Post that Trump disrespected her son.
White House aides have said Obama sent letters, called and met personally with relatives of fallen soldiers.