"The presidents on Mount Rushmore may have to make room for a new addition."
Sinclair Broadcast Group has come under fire for having its anchors read out conservative messaging.
A Sinclair executive has some media criticism of his own.
The candidate said her donors' contributions "will never be used to enrich these chilling right-wing efforts."
"Sinclair is far superior to CNN and even more Fake NBC, which is a total joke," Trump tweeted.
"I feel for my former colleagues being forced to read this garbage."
After airing a segment on the so-called deep state, the media giant required anchors to read a script lamenting fake news stories.
A merged company could face regulatory challenges which could result in divestitures.
Trump's deregulatory push could target rules that prevent companies from owning too many media properties.