The Democrat lawmakers who encouraged US troops to disobey illegal orders are pushing back on an alleged federal inquiry into their actions.
Democratic Senator Elissa Slotkin of Michigan said the FBI on Monday notified the six lawmakers who appeared in last week's video of the investigation.
"No amount of intimidation or harassment will ever stop us from doing our jobs and honoring our Constitution," four US House members said.
Their message to troops prompted US President Trump to accuse the Democrats of "seditious behavior, punishable by death" and a Pentagon review of "serious allegations of misconduct" against Democratic Senator Mark Kelly of Arizona, who also appeared in the video.
The Department of Justice declined to comment on the alleged investigation.
