WASHINGTON — President Trump wants the death penalty for the suspect in New York City's terror-inspired truck attack, but his advocacy could make a successful prosecution more difficult, legal experts say.

As he has done in other cases, such as the immigrant and refugee travel ban and the military desertion of Army Sgt. Bowe Bergdahl, Trump appears to have tainted the judicial process, whether by impulse or design.

"NYC terrorist was happy as he asked to hang ISIS flag in his hospital room. He killed 8 people, badly injured 12. SHOULD GET DEATH PENALTY!" the president tweeted around midnight Wednesday. 

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