There is plenty of easily identifiable proof of her lies. This account is from the Chicago Tribune, which historically is one of the more conservative major dailies:
Sanders provided an incorrect tick-tock for the firing of accused spousal abuser Rob Portman. She falsely told the press the president never encouraged violence (although he was recorded during campaign rallies doing just that). She routinely denied that senior advisers were going to be fired — right before they were fired. She repeatedly said that President
Donald Trump's gaffes or insults were "jokes," when his tone and demeanor plainly suggested otherwise. That said, when Trump and lawyer Rudy Giuliani reversed course Wednesday and Thursday, confessing that Trump did know about the Stormy Daniels deal and did reimburse Michael Cohen for the $130,000, the White House reporters seemed to finally reach their breaking point.
The Post reports:
"Back in March, Sanders denied Trump knew about the payment and said it was based upon her own conversation with Trump. 'I've had conversations with the president about this,' she said. 'This case has already been won in arbitration, and there was no knowledge of any payments from the president, and he has denied all these allegations.' ... 'We give the very best information that we have at the time,' she said, later repeating a version of that phrase several times."
This, too, is dishonest, given that Sanders often has the requisite information (e.g. a Trump statement on video) but chooses to dissemble about it. Nevertheless, in this case she essentially said what the president told her turned out not to be true.
ABC News' Jonathan Karl demanded to know how we can trust an administration that shows "what appears to be a blatant disregard for the truth." When Sanders kept insisting she gave the best information available, CNN's Jim Acosta demanded to know whether she was being lied to by the president. He asked her, "Why can't you just answer yes or no whether you were in the dark. I think it's a fairly simple question whether you just didn't have the information at the time."
Sanders, if she hadn't before, has used
up her credibility. If she cannot get and/or cannot relate truthful information, she has no business standing behind the podium. We can debate whether she knows her boss is a liar and goes along, or whether she is so gullible that she believes what he tells her — even if he then changes his story. Whatever the reason, it's not enough to tell the media and the country "I didn't know better" — it's her job to know better and answer with authority.
Moreover, if Sanders was really trying to do her job honestly, she would come forward the moment she learned that she had been given false information. Instead, she plays 20 questions with the press, waiting to reveal new information only when a series of questions manages to corner her. Even worse, instead of responding to questions about misstatements, she frequently retorts by accusing the media or others of acting unfairly. (It's quite a sight to see the White House defend itself by petulantly claiming, in essence, "You guys were mean to the president!")
Chicago Tribune