Washington (CNN) -- Sen. Kay Hagan's campaign said late Wednesday the North Carolina Democrat missed a classified hearing last winter on the threat from the terrorist group ISIS to go to New York to raise money for her re-election. Hagan admitted earlier this week she didn't attend a hearing because she went to the fundraiser but didn't disclose which hearing she missed. Her decision to skip the Armed Services Committee session -- at which high-level administration intelligence officials filled in senators on top secret details about the group -- is drawing fire from her Republican opponent, North Carolina House Speaker Thom Tillis, who is narrowly trailing her in recent polls.
@highlight
Sen. Kay Hagan's admission might hurt her chances at re-election
@highlight
Republican challenger Thom Tillis says Hagan "failed to do her job"
@highlight
Similar charges have been made ahead of hard-fought midterms
But one of the dirty little truths about the way @placeholder works is that lawmakers from both parties have very busy schedules and don't attend all the hearings of the committees and subcommittees to which they are assigned.