President Trump took to Twitter early Wednesday to rail against social media companies, escalating a battle with Twitter over using a fact-check label on his tweets for the first time this week.

“Republicans feel that Social Media Platforms totally silence conservatives voices,” Trump tweeted.

The president’s response came after Twitter on Tuesday slapped a fact-check label on Trump’s tweets for the first time, a response to long-standing criticism that the company is too hands-off when it comes to policing misinformation and falsehoods from world leaders.

The tweets falsely claimed mail-in ballots are fraudulent.

But they also play into Trump’s election-year agenda, in which he already has started railing against alleged bias by social media companies.

The Wall Street Journal reported last week that Trump was considering creating a White House panel that would examine complaints of bias against conservatives on social media and other online platforms.

Trump accuses social media companies of ‘terrible bias’ at White House summit decried by critics.

Trump and his surrogates have some of the most popular accounts on social platforms but frequently protest that the social media companies censor their voices.

But Trump has made many false claims on social media, particularly on his preferred medium of Twitter, and also has attacked people in ways critics have argued could violate company policies on harassment and bullying.

Those tweets are still up, a reflection of social media companies’ approach to policing content that can appear inconsistent even as they have stepped up their enforcement.

However, Trump posted the same content about mail-in ballots on Facebook