httpss://www.youtube.com/watch?v=BhEL9Fi74eA

The Clinton campaign called on Mr. Comey to provide information beyond what was put forth in the letter.

Photo “Director Comey’s letter refers to emails that have come to light in an unrelated case, but we have no idea what those emails are and the director himself notes they may not even be significant,” said John D. Podesta, the chairman of Mrs. Clinton’s campaign.

“It’s unclear whether these emails have already been reviewed or if Secretary Clinton sent or received them. In fact, we don’t even know if the F.B.I. has these emails in its possession.”

The Republican National Committee cheered the new attention on Mrs. Clinton’s emails as a potential turning point in the race.

The involvement of Ms. Abedin and Mr. Weiner in Mrs. Clinton’s case was an unforeseen twist.

“I only worry for the country in that Hillary Clinton was careless and negligent in allowing Weiner to have such close proximity to highly classified information,” Mr. Trump said in August.

An earlier version of this article incorrectly reported when the F.B.I. director, James B. Comey, announced that the bureau had closed its investigation into Hillary Clinton’s email use.

Hillary Clinton