President Donald Trump’s son on Monday faulted former President Barack Obama for not doing more to counter Russian interference in the 2016 election, while maintaining that the interference did not significantly help his father.

“What started off as a hoax – you know, Trump won the election because of Russia – has been proven to be nothing further from the truth,” Eric Trump said on “Fox & Friends.”

Nothing has been proven on that front: It is out of the immediate scope of special counsel Robert Mueller’s probe to determine if Russian meddling tipped the election in Trump’s favor. Neither has Mueller concluded, one way or the other, whether the Trump campaign knowingly worked with Russia to influence the election. (Donald Trump Jr. and several other senior campaign officials have acknowledged meeting with Russians promising dirt on Hillary Clinton, though.)

“But the Russians being bold enough to meddle has to be stopped, and I hope that gets addressed,” co-host Brian Kilmeade said.