Rick Harrison got a call from 2 of Donald Trump‘s sons after his own son, Adam Harrison, died from a fentanyl overdose.

A rep for the “Pawn Stars” patriarch tells TMZ … Donald Jr. and Eric Trump reached out to Rick after learning of Adam’s death. We’re told the Trumps spoke to Rick on the phone to offer their condolences.

The Trump and Harrison families have a long relationship. Rick’s been a vocal supporter of the former president for years — at one point referring to himself as a “Trump guy.”

When DT was in the White House, he and Rick met in September 2018 … snapping a photo together with Rick’s youngest son, Jake.

Even before the phone call, Don. Jr commented on Rick’s tribute post to Adam, “I’m so sorry man.”

TMZ broke the story … Adam died last week from a drug overdose.

Rick told us fentanyl killed his 39-year-old son and added, “The fentanyl crisis in this country must be taken more seriously. It seems it is just flowing over the borders and nothing is being done about it. We must do better.”