"It's ridiculous," Clinton said on NBC's "Today" show. "It's another absurd lie to cover up what really was going on, which I hope we finally uncover and understand."
Trump Jr. testified last week for five hours before the Senate Judiciary Committee behind closed doors to discuss the meeting he held at Trump Tower last summer with Russian lawyer Natalia Veselnitskaya.
"To the extent they had information concerning the fitness, character, or qualifications of a presidential candidate, I believed that I should at least hear them out," Trump Jr. wrote in a statement provided to the committee before his testimony.
"Depending on what, if any, information they had, I could then consult with counsel to make an informed decision as to whether to give it further consideration," said the statement, which was obtained by The New York Times.
The rationale was a departure from the initial statement Trump Jr. had given after
Clinton gave several major interviews on Tuesday and Wednesday to tout her book "What Happened," which was released the previous day and details the events that led up to her November, 2016 election loss.
Asked by host Matt Lauer whether the believed the Trump campaign colluded with Russia to sway the presidential election, Clinton replied, "Matt, I can't say that. That's what this investigation is to determine."