Donald Trump says FBI decision on Clinton emails was 'rigged'

Donald Trump has condemned the FBI recommendation against criminal charges for Hillary Clinton over her use of a private email server while secretary of State.

"The system is rigged," Trump tweeted less than an hour after the announcement by FBI Director James Comey. "General Petraeus got in trouble for far less. Very very unfair! As usual, bad judgment."

Trump referred to charges brought against former Gen. David Petraeus, though that case involved the direct transfer of classified information to his mistress/biographer.

While Comey said there was not enough evidence to prove that Clinton intentionally transferred classified information, warranting prosecution, the FBI director said the former secretary of State and her aides "were extremely careless" in their handling of sensitive material.

Picking up that theme, Trump also tweeted: "FBI director said Crooked Hillary compromised our national security. No charges. Wow! #RiggedSystem"

Expect Trump to amplify his attacks at a rally Tuesday night in Raleigh, N.C., not to mention over the next four months of presidential campaigning.

Trump has long predicted that the FBI and Justice Department would absolve Clinton, claiming the investigation was "rigged" in her favor.

While Trump has argued that Clinton's use of private email renders her unfit to be commander in chief, Clinton has said the Republican's harsh attacks on foreign leaders and global alliances make him a "reckless" choice for the White House.

In his statement at FBI headquarters, Comey praised the FBI for its handling of this election-year investigation, saying that agents acted "in an entirely apolitical and professional way. I couldn't be prouder to be a part of this organization."