Democratic Primary
Sanders denied the 2018 exchange, which was first reported by CNN.
In a mid-August editorial, the Houston Chronicle encouraged the former Texas congressman to run for senate instead.
The president said there was "something going on" at the conservative news network.
US president hit back at Democrat candidate between visits to scenes of mass shootings.
"We see it on Fox News, we see it on the internet, but we also see it from our commander in chief," former Representative Beto O’Rourke said.
The former congressman from Texas broke out the Spanish early, and the looks from his rivals said it all.
Even when the 10 candidates disagreed with progressive orthodoxy, they were talking about it — and they mostly weren't attacking their rivals for being too extreme.
Things stayed peaceful, Warren shut down some Sanders criticism, Castro shone and Trump got off easy.