Yep, he wants to raise taxes on the wealthy and corporations. Not on the middle class.
Republicans already stacked SCOTUS by refusing to consider Obama's nominee, Garland. Pete's views on the Supreme Court are a bit more nuanced than just stacking the court. He likes the idea of expanding the court to 15 justices: five justices are appointed by Democratic presidents, five are appointed by Republican presidents, and then those 10 justices must unanimously agree on appointing the five additional justices, who would come from the appellate bench.