President Donald Trump appeared to accuse Democrats of rigging the system against Sen. Bernie Sanders, I-Vt.

Trump, referring to Sanders as “Crazy Bernie,” made his comments in a Friday tweet.

He wrote: “It is happening again to Crazy Bernie, just like last time, only far more obvious. They are taking the Democrat Nomination away from him, and there’s very little he can do. A Rigged System!”

It’s not the first time, Trump has made the accusation.

In a series of tweets before the Iowa Caucus, Trump claimed the Democratic National Committee was working along with former New York City Mayor Mike Bloomberg to rig the election against Sanders.

"It is not currently rigged,” Jeff Weaver, a senior adviser for the Sanders’ campaign said on MSNBC earlier this month. “Last time it was rigged."