Trump Push to Rein in Social Media Hampered by Own Turn on Ally

President Donald Trump’s move to yank Republican FCC Commissioner Michael O’Rielly‘s renomination may backfire on his push to limit content liability protections for Twitter Inc. and other social media companies.

There’s scant chance Trump will get a replacement confirmed during this congressional session, and he may have tarnished any goodwill he had with O’Rielly, agency watchers say. Trump needs the backing of the Federal Communication Commission’s three Republicans to advance his push, which is opposed by the two Democratic members. O’Rielly can still serve through the end of the year.

O’Rielly, who has been on the commission through Democratic ...