Democratic presidential candidate Hillary Clinton seems like she is doing just enough to keep her rival, Vermont Sen. Bernie Sanders, at bay in the primary results.

After Super Tuesday, the former Secretary of State won in seven states, as opposed to Sanders’ four. It was far from close in most states where Clinton, 68, has won, except Massachusetts, where she escaped with a 50-49 victory over the senator.

But despite her dominance in recent primaries, where she has already garnered a total of 1,052 delegates, one particular issue is once again threatening her bid for the nomination – and that threat is not Sanders.

The Democratic front-runner faces questioning from the Federal Bureau of Investigation (FBI), concerning her use of an unsecured private network where classified emails passed during her stint as Secretary of State from 2009 to 2013.

Last month, the Obama administration announced that hundreds of emails that are deemed classified passed through Clinton’s unsecured email network, putting the information at risk of cyber theft.

According to one law enforcement official, the FBI may begin questioning Clinton and her other aides in the coming weeks.

There are 1,800 reasons why the controversy over Hillary Clinton’s emails is far from over https://t.co/95B8arauUk pic.twitter.com/yLKJg4keXB — VICE News (@vicenews) March 1, 2016

The FBI investigation, which includes almost half-a-dozen inquiries and proceedings, requires the questioning of Clinton, although that does not mean she has already broken the law or committed any violations.

While most legal counsels would have instructed their clients not to answer such interviews, it would be counterproductive for Hillary’s campaign to withhold information that she knows.

Reports said that the investigation is expected to be completed by May, after which the FBI would be able to file criminal charges to anyone who they think is responsible.

Regardless of the upcoming questioning, Clinton’s campaign is confident that the candidate did not violate any federal laws, and has in fact, become very cooperative in the investigation.

“As we have said since last summer, Secretary Clinton has been cooperating with the Justice Department’s security inquiry, including offering in August to meet with them to assist their efforts if needed,” said Brian Fallon, a spokesman for Hillary Clinton.

Meanwhile, Bryan Pagliano, a member of Clinton’s staff who set up the private and unsecured server in 2009, has already been granted immunity in the case.

Bryan Pagliano, Hillary Clinton worker, cooperating with FBI in email scandal: https://t.co/xQfDfR6Edf pic.twitter.com/Utr6s87pIv — The Washington Times (@WashTimes) March 3, 2016

Despite the optimism of the Clinton campaign, a former federal prosecutor said that the presidential candidate might potentially be indicted, resulting in chaos within the Democratic Party’s convention in July.

“There is no way Secretary Clinton and her staff have not violated classified information laws — both misdemeanors and felonies,” according to former U.S. attorney for District of Columbia Joseph E. DiGenova.

The legal expert added that the FBI is already carrying out a serious criminal investigation.

Exclusive: FBI Investigating If @HillaryClinton Aides Shared Passwords to Access Classified Info https://t.co/s8TYIzEJGm #HillaryEmails — Fox Nation (@foxnation) March 3, 2016

DiGenova believes that the FBI will be ready to recommend charges within the next two months, only a couple of months before the Democratic National Convention.

“It could and should come down by then. The people deserve to know if the person who may be president of the United States has violated federal law,” he added.

Hillary Clinton has long been considered a strong candidate for the presidency. Even during the 2008 elections, she initially had the upper hand against Barack Obama, but then eventually lost.

This time, while Hillary is doing well in recent primaries, her campaign has failed to permanently put away Bernie Sanders, who has become a strong contender for the Democratic nomination. In February alone, Sanders managed to raise $42.7 million in funds, while Clinton “only” collected $30 million in the same period.

While the percentages are quite low, it is worth contemplating how things will turn out if Hillary Clinton is indicted. Will she be allowed to continue her campaign or not?

[Image by Scott Olson/Getty Images]