Donald Trump spent his final Florida campaign rally encouraging voters to consider what might happened if they elect Hillary Clinton, who he claimed his "likely" to be indicted as the president-elect, citing recent reports.

"It was reported last night that the FBI is conducting a criminal investigation into Hillary Clinton's pay-to-play corruption during her tenure as secretary of state. In other words, the FBI is investigating how Hillary Clinton put the office of secretary of state up for sale in violation of federal law," the Republican presidential hopeful said in Jacksonville, Fla., on Thursday.

"The investigation is described as a high priority. It's far-reaching and has been going on for more than one year," Trump said, reading from a Fox News report released late Wednesday night in which FBI sources said the agency's White Collar Crime division has gathered an "avalanche of new information" related to the Clinton Foundation's dealings.

"The FBI agents say their investigation is likely to yield an indictment," he added, as members of the crowd chanted "Lock her up!"

Trump praised the FBI for not destroying devices belonging to top Clinton aides Cheryl Mills and Heather Samuelson, both of whom were granted immunity deals during the agency's investigation into Clinton's private email server.

"Good job by the FBI," said the GOP nominee, noting that the FBI has been using information found on those devices for their investigation into Clinton's charitable foundation.

Trump described the latest developments involving his Democratic opponent, her unsecured email server and the Clinton Foundation as "phase two" of an investigation that should have ended at phase one. "But she was protected by the Department of Justice" the first time around, he claimed.

"These are sad events for our country. A high-ranking public official has been caught selling her office, threatening national security and engaging in a massive criminal cover up," Trump said of Clinton. "If she were to win, it would create a massive unprecedented constitutional crisis."

"This is not what we need in this country, folks. We need somebody who is going to go to work," he said. We need a president who's going to go in and do the job."

Trump's Jacksonville rally marked his fourth campaign stop in 24 hours in the Sunshine State, which has become a must-win battleground for his campaign. The billionaire will head to North Carolina late Thursday afternoon while his wife, Melania, makes her first solo campaign appearance five days before the Nov. 8 election in Pennsylvania.