The power to impose tariffs rests with the legislator, not the executive. Of course our congress is effectively useless - we can thank decades of Mitch McConnell's (and others) "not giving the other side anything" thinking for that.
The description of some of those emergencies is comedic: "Declared a bank holiday from March 6 through March 9, 1933, using the Trading with the Enemy Act of 1917 as a legal basis."
[1] - https://en.wikipedia.org/wiki/List_of_national_emergencies_i...
It was to stave off a bank run at the beginning of the great depression, and it was only done as a temporary measure so that Congress had time to write the long term legislation which they did 4 days later on March 9th.
This is something FDR did heavily in the 1930s to expand his own power and bully congress into passing the New Deal. https://www.ebsco.com/research-starters/history/purge-1938 He also used legally questionable executive orders like crazy.
Attacking FDR, someone who stood up against business interests to defend labor, kinda exposes the game here.
There's lots of other examples, such as the various emergency powers, including a large string of them for terrorism during Bush and expanded during Obama.
I've been posting about this issue on HN long before Trump was in power and plenty of journalists were documenting it.
He borrowed just enough of the stuff socialists were promising, and bolted it onto the government to mollify the working class who'd been absolutely ravaged by oligarchs for the preceding decades. You only have to look at the rest of the world to see how things might've turned out without FDR's very reasonable interventions.
Congressional Republicans confirmed every single one of his cabinet members.
So perhaps he demands it, but does not give congress a pass. At all. They chose to let him.
...raise taxes
The state of exception is the true test of sovereignty, and powers that crave sovereignty therefore seek out states of exception. The PATRIOT act created new institutions and authorities like the TSA. Just a few years ago local health departments were making business-shuttering decisions that ruined life for a lot of people over the common cold. Ukrainian war funding provides the EU with opportunities for exports and new experiments in joint funding (Eurobonds). Emergencies and exceptions are how power grows, so everything can become an emergency if you look at it in the right way.