George Galloway has described Sarah Olney as a "schoolgirl" and said the new MP's performance on talkRADIO last week was "pitiful."
Olney appeared on our show on Friday, just hours after her victory in the Richmond Park by-election, and was given a torrid time by Julia Hartley-Brewer.
The newly elected lawmaker was dragged off the call after just three minutes, after falling silent when Julia asked why the Lib Dems had changed their policy on the single market after the EU referendum.
The interview, which made national headlines and plunged Olney's political career into crisis almost before it had begun, can be heard here.
Galloway said "that question that Julia asked [about the single market] was absolutely legitimate, it was actually rather smarter than I had thought, it was a very good point.
"Farron said people didn't vote to leave the single market, but as Julia pointed out, perfectly properly, actually every statement that was ever made in the referendum said that if you leave the EU you're leaving the single market.
"For a by-election victor, just hours after her great result [in Richmond Park], to be unable to answer that in to leave the interview in such a schoolgirl, amateur, greenhorn way is really a bit pitiful."