WASHINGTON (AP) - House Speaker Nancy Pelosi (puh-LOH'-see) is voicing concern over President Donald Trump's comments that suggested retaliation against people who helped an intelligence whistleblower. The whistleblower's complaint about Trump's phone call with Ukraine's leader is at the center of the House impeachment probe.

White House officials took extraordinary steps to "lock down" information Trump's call, even moving the transcript to a secret computer system, according to the complaint.

Trump lashed out Thursday, saying whoever provided information to the whistleblower is "close to a spy." Trump suggested that was treason, an act punishable by death.

Pelosi told MSNBC's "Morning Joe" Friday she's "concerned about some of the president's comments about the whistleblower."

She said the House panels conducting the impeachment probe will make sure there's no retaliation against people who provided information.