I'm not sure what David Broockman was trying to prove with this study. Consuming partisan propaganda from either side of the aisle will bring you closer to that

I'm not sure what David Broockman was trying to prove with this study. Consuming partisan propaganda from either side of the aisle will bring you closer to that side? I skimmed through the study[1] and it seems to me that all they confirmed was that watching a news outlet which is the mouthpiece of the Democratic party makes one more sympathetic to the Democratic party. [1]https://osf.io/jrw26/ https://osf.io/jrw26/