I'm more concerned about the effects that things like what's been going on in Hungary for the last almost ten years and seems to be getting worse by Obran using coronavirus as an excuse to increase his power, and worsening voter supression in the USA have on the overall health of their democracies than what Vizcarra is doing in response to a global pandemic where numerous countries, both democratic and authoriatarian, are taking similar measures.
If Vizcarra takes measures similar to Orban in Hungary I'll be concerned. If Vizcarra, like Orban or the Bush administration in the early 2000's, uses a crisis to strengthen his personal power or permanently strenghten the power of the government over it's people (USA PATRIOT Act and increased survelliance of citizens for example) I'll be concerned. So far Vizcarra hasn't limited the freedoms of the press or any other personal freedoms other than the right to assemble - again, similar to many other nations. As far as I know, Vizcarra hasn't shown through words or past actions any desire to be more authoritarian.
Trump is worrisome in that he's made obvious his like for "strong" authoritarians while demeaning (former?) traditional, democratic US allies. Throughout his first term he's made it clear that he doesn't respect Constitutionally mandated oversight by the legislative branch. His recent firing of the inspector general for the Intelligence Community for merely doing his job, and the acting inspector general of the Pentagon, disabling him to fulfill his new role as the chair of the Pandemic Response Accountability Committee (chosen for the new role by the other inspectors general on the committee), is further evidence. It could be said that the fact that Trump has so many "acting" high ranking officials in his administration who are not subject to Senate hearings and approval is further evidence that he does not respect the role of oversight and separation of powers. Surviving impeachment suggests that he's not learned any lessons (as some members of the GOP in the House and Senate suggested) and will continue with this behaviour. Should he be reelected and not have to concnern himself with future elections I wouldn't be surprised if he magnifies this behaviour.
I doubt Trump could pull of Obran level authoritarianism, but it wouldn't be for lack of desire or trying. Like Krugman's Op-ed states. "Donald Trump, as usual, said the quiet part out loud: If we expand early voting and voting my maile, "you'd never have a Republican elected in this country again." No concern about democracy, fairness, encouraging voter participation by making it easier (by mail, as Trump and other vote-by-mail critics have recently done themselves) and safer in this time of coronavirus instead of putting obstacles in their way, etc.. Just a concern about a political party faced with changing demographics being able to maintain it's power through gerrymandering and voter supression because they are losing at the voting booth. By 3 million votes in the popular vote count in the 2016 presidential election, and as Krugman states about Wisconsin, the Democrats winning 53% of the vote for State Assembly but only getting 36% of the Assembly's seats.