The MRC's recent study of cable news election coverage was a topic of discussion during the April 25 edition of Fox New's Happening Now. During the segment, Fox contributor Alan Colmes and radio host Tammy Bruce both agreed with the study, but had different theories as to why it was the case. Bruce argued that the media didn't focus on Hillary Clinton and Bernie Sanders for fear of exposing their flaws, while Colmes countered that the lopsided coverage was merely the result of the GOP campaign being more entertaining.
You can read the original, two-part study here:
The Prime Time Primary: Trump vs. His Rivals on Fox News, CNN and MSNBC
The Prime Time Primary: How Cable News Has Covered the Democrats