Only I can...

It may not be obvious why anyone would worry about how much power Trump can hold in his hands. Vox again: Experts on authoritarianism are absolutely terrified by the Comey firing - Vox:

"It's not that the elected leaders in these countries set out to become an authoritarian, per se. It's that they care about their own power and security above all else, and do things to protect their own position that have the effect of removing democratic constraints on their power."