Is it though? According to Pew, only 20% of US adults use Twitter: https://www.pewresearch.org/fact-tank/2019/04/10/share-of-u-...
In comparison, Fox news is used as a source by 40% of the US population: https://www.pewresearch.org/fact-tank/2020/04/08/five-facts-...
The share is bigger for Facebook, though (69%)