In a segment on CNN Wednesday morning, Chris Cuomo called out Rick Santorum for enabling Donald Trump’s lies about voter fraud.

WATCH: CNN’s Chris Cuomo shuts down Rick Santorum on Trump voter fraud lies

 

Donald Trump in a tweet Wednesday morning announced he was calling for “major investigation” into voter fraud.

Cuomo started the exchanged by saying, “His basic notion is a lie. There’s no proof.”

To which Santorum replied, “I think what we’re looking at here is the potential for fraud — and it is vast.”

But Cuomo interrupted him, “That’s not what he said. He doesn’t say potential. He says, between 3 and 5 million voted illegally and that’s why I lost the popular vote.”

Later on Cuomo continued to slam Santorum on Trump’s voter fraud lie, “That’s not what the president is saying. He’s saying, I lost because 3 to 5 million people — just like those people celebrating after 9/11 — that’s what took it away from me. And it’s a lie… It’s a dangerous lie because if people try to validate an untruth like this, where does it lead us when the truth matters to the American people over time, whether someone attacked us, what the numbers of dead are abroad, what the reality of our economic situation? If he’ll lie about something this small, what does it mean later?”

Cuomo continued by saying, “Rick, I’ve got to tell you, to a certain extent, you’re encouraging the problem here. Because you’re redefining the issue to make it more acceptable. ‘Well, there is voter fraud. Well, we do have to look at it.’ That’s not what he’s talking about and you know that.”