Which indeed it was. But the media has largely been going to bat for her. Hillary's own cover up squad were warning that Obama's lie about her rogue email server operation was going to collapse.
In a March 2015 email chain, Cheryl Mills, a top legal adviser and longtime member of Clinton's inner circle, told campaign Chairman John Podesta of an interview in which Obama said he learned about Clinton's private email setup from news reports.
"We need to clean this up -- he has emails from her -- they do not say state.gov," Mills wrote to Podesta.
And they didn't. But no one has really asked him about it. Obviously conservative sources called him out on it, but even Hillary's people were calling him a liar.
Two days later, White House spokesman Josh Earnest clarified the President's answer, saying that while Obama received emails from Clinton, he was unaware of her private email server.
"The point that the President was making is not that he didn't know Secretary Clinton's email address -- he did -- but he was not aware of the details of how that email address and that server had been set up or how Secretary Clinton and her team were planning to comply with the Federal Records Act," Earnest said on March 9, 2015.
And thus the clean up happened.
"In other words, Mills was saying Obama, he had to know that Hillary was using an illegal server but he claimed otherwise," Trump said. "So that means Obama is now into the act. ... He's caught up now, folks."
And he's been caught.