Sen. Rand Paul (R-KY) railed against the GOP primary process Tuesday on MSNBC’s “Morning Joe,” calling the process “biased.”

“I don’t think they’re rigged, but they are biased. And intentionally so,” said Paul, who dropped out of the Republican presidential race after a disappointing finish in the Iowa caucuses.

When asked to clarify, Paul said that the word “rigged” implied the party was doing something illegal and “somehow shady.”

“No, it’s done somewhat in the open, but they’re biased in favor of the establishment,” Paul said.

He went on to explain a rule that states a candidate cannot be nominated without winning a majority of delegates in at least eight states. He pointed out that his father, former Rep. Ron Paul (R-TX), who ran for the Republican nomination in 2012, did not meet that threshold.

“But interesting now, if you talk to all of the Republican establishment, they’re saying, ‘Oh, yes, your votes can be counted,'” Paul said. “This is a big deal because, think about it, Kasich’s votes cannot be counted. Under rule 40-B they should not be counted.”

Ohio Gov. John Kasich, who has won just the Ohio Republican primary so far, previously brushed off that rule, calling the nomination process “bizarre” and talking up the possibility of an open convention.

Watch below via MSNBC: