The military legal defense team for Sgt. Bowe Bergdahl asked Saturday to interview leading Republican presidential candidate Donald Trump. Trump frequently harangues Bergdahl and criticizes his release in a Taliban prisoner swap organized by President Obama.

Bergdahl currently stands court-martial trial, on charges of desertion.

"Based on your personal knowledge of matters that are relevant to Sergeant Bergdahl's right to a fair trial, this interview will help us determine whether to seek … your personal appearance as a witness," Franklin D. Rosenblatt, Bergdahl's attorney wrote in a letter to Trump.

Bergdahl, because his release came at the price of the release of five Taliban prisoners, is a frequent target of Trump on the campaign trail. Trump uses the case to demonstrate that President Obama is poor negotiator, and the billionaire businessman doesn't seem to much care for Bergdahl, an alleged deserter, personally.

"We're tired of Sgt. Bergdahl, who's a traitor, a no-good traitor, who should have been executed," Trump said in October.

"Thirty years ago," Trump said, "he would have been shot."