A key Hillary Clinton supporter on Sunday rejected the idea of appointing a special prosecutor to investigate the former secretary of state's private emails, and said the investigation has not been compromised despite Attorney General Loretta Lynch's private meeting with the candidate's husband, Bill Clinton, last week.

Rep. Xavier Becerra, D-Calif., said repeatedly on "Fox News Sunday" that Bill Clinton's meeting with Lynch was just a "chance encounter" and therefore didn't require Lynch to recuse herself. The attorney general has said she would follow the advice of career prosecutors at the Justice Department, he noted.

"Why stop that process?" Becerra asked. "Just because you have a chance encounter with Bill Clinton, you don't throw that away."

The probe is apparently close to wrapping up. Clinton met privately with Justice Department officials Saturday morning for a three and a half hour interview. Her campaign characterized it as "a voluntary interview this morning about her email arrangements while she was secretary," and Clinton said she was happy to help the ongoing "review."

CNN has reported, based on anonymous sources, that the Justice Department has decided that charges will not be brought against Clinton. Republican presidential candidate Donald Trump has said that if that report turns out to be true, it will be proof that the system is "rigged."

"It is impossible for the FBI not to recommend criminal charges against Hillary Clinton," Trump tweeted. "What she did was wrong! What Bill did was stupid!"