Professor Christina Pagel of University College London has mapped the actions of the Trump administration’s first few weeks into a Venn diagram with “five broad domains that correspond to features of proto-authoritarian states”:

• Undermining Democratic Institutions & Rule of Law; Dismantling federal government
• Dismantling Social Protections & Rights; Enrichment & Corruption
• Suppressing Dissent & Controlling Information
• Attacking Science, Environment, Health, Arts & Education
• Aggressive Foreign Policy & Global Destabilization

The information is also contained in this categorized table. And to keep upto date on the all of the Trump administration is this list of authoritarian actions that the Trump administration has taken, each with a link to the relevant news story.