By Jesse Byrnes
GOP presidential candidate Jeb Bush on Wednesday said he would have challenged Hillary ClintonHillary Rodham ClintonFULL SPEECH: Michael Bloomberg 'invades' Democratic convention FULL SPEECH: Vice President Biden speaks to the delegates Bloomberg offers scathing indictment of Trump MORE on the controversy surrounding her use of a private email server while secretary of State, something her rivals did not do during the first Democratic presidential debate.
"It's clear the Russians and Chinese were trying to hack into her server," Bush said of the former secretary of State. "Information crossing that server was of national security interest, for sure."
"I would have taken her to task for that, and if she wins the nomination and if I win the nomination, trust me, this is not going to end," Bush added.
Republicans have viewed the federal probe of Clinton's use of a private email server during her four-year tenure as secretary of State as her greatest vulnerability in the race.
But the four challengers with her on the debate stage Tuesday night in Las Vegas did not raise the issue. Instead, during one memorable moment, Sen. Bernie Sanders (I-Vt.) defended Clinton on the issue, suggesting the controversy is old news.
"I think the American people are sick and tired of hearing about your damn emails," Sanders said.
Another Republican presidential candidate, front-runner Donald Trump, described Sanders's defense of Clinton as "a big mistake" on Wednesday.