The split among Democrats seen nationally was expected to play out at the Wisconsin convention on Saturday when Sanders backers were pushing a resolution that calls for doing away with superdelegates.

Day two of the convention on Saturday is when Democratic delegates will debate resolutions and elect Wisconsin's four Democratic National Committee members for terms beginning after the Democratic National Convention in July.

Courtney issued a statement Friday as the Democratic convention began, branding Senate candidate Russ Feingold and presidential candidate Hillary Clinton as "decades-long career politicians championing yesterday's policies".

U.S. Senator Tammy Baldwin is one of the Superdelegates supporting Hilary Clinton, but the Senator said she is open to listening to the people of Wisconsin.

In addition, Feingold promises in his speech Friday at the Democratic Party convention to be bipartisan.

Feingold has not said whether he voted for Clinton or Sanders in Wisconsin's primary. They're controversial because they don't have to go along with how their state voted.

"Russ is going to be the star of the convention", Pocan said Friday morning.

Clinton is hoping to seal the nomination next week, when a slew of big states including New Jersey and California will hold primaries, allowing her to consolidate her party's support ahead of a general election matchup against Trump. Even though he's been very careful not to endorse Sanders or Clinton.