MIAMI — Donald J. Trump once again raised the specter of violence against Hillary Clinton, suggesting Friday that the Secret Service agents who guard her voluntarily disarm to “see what happens to her” without their protection.

“I think that her bodyguards should drop all weapons,” Mr. Trump said at a rally in Miami, to loud applause. “I think they should disarm. Immediately.”

He went on: “Let’s see what happens to her. Take their guns away, O.K. It’ll be very dangerous.”

In justifying his remarks, Mr. Trump falsely claimed that Mrs. Clinton wants to “destroy your Second Amendment,” apparently a reference to her gun control policies.