You need to move beyond word labels and search for meaning behind the words. In his day, John Locke was considered a "liberal." Doesn't mean he has anything in common, politically, with Ted Kennedy.
Bottom line: there is absolutely no disputing the fact that Earl Warren was a liberal Republican who was loved not only by California's Republicans, but Progressives and Democrats as well.
It's part of the historical record.
Thanks for dismissing all that proof without so much as a look.
Warren was a libertarian, have you ever looked at the libertarian party platform?