Save democracy . . . with socialism?

I got an offer to review a book, ". . . the 2020 election is a key moment in the history of American democracy where the United States can choose to correct course, installing a new chief executive and legislators that will defend bedrock democratic ideals and freedoms, or it can travel further down the road of Trumpism . . ."

I wonder what those bedrock democratic ideals and freedoms are? Freedom of religion?  Free speech?  Freedom of assembly?  You can't find them in socialism, the ideology that killed 100,000,000 in the 20th century.