Tangerine hate-clown, Nazi-parties endorsed "Trump says he plans to designate antifa as ‘major terrorist organization’"
https://www.theguardian.com/us-news/2025/sep/17/trump-antifa-terrorist-organization
There is no USA designation of "major terrorist organization" and antifa is not "a [...] organization".

Fascism aims to end people simply for the act of existing.
Anti-fascism strives to prevent that from happening.
Fascism wants to rule through oppression forever; anti-fascism wants to abolish itself by having abolished fascism and thus the basis for itself existing.
Fascism wants to abolish peoples.

Trump says he plans to designate antifa as ‘major terrorist organization’

It is unclear how anti-fascists, an umbrella term for far-left-leaning groups rather than a single entity, will be labeled

The Guardian
Viktor Orbán, the far-right, hate-politics based PM of Hungary who dragged the country down to become an "electoral autocracy" (according to the EU Parliament https://www.europarl.europa.eu/news/en/press-room/20220909IPR40137/meps-hungary-can-no-longer-be-considered-a-full-democracy), closest friend of Putin in EU and friend of Trump, now says that in Hungary "the time has come for us to classify organizations such as antifa as terrorist organizations, following the American model"
https://apnews.com/article/hungary-antifa-terrorist-organization-trump-orban-5d4e2041f82acc603f9b1c78375b25d7
It is of course still not "an organization", but reality does not matter to authoritarians – it must bend to their decrees at every personal whim.
MEPs: Hungary can no longer be considered a full democracy | News | European Parliament

Parliament condemns the “deliberate and systematic efforts of the Hungarian government” to undermine European values and demands results in the Article 7 process.

A designation that doesn't exist, under authority not had, against an organization that isn't an organization,
from the Nazi-parties endorsed tangerine hate-clown, after obviously seeking to reach this point against the most effective opponent for a decade,
in a decree that is filled with inaccuracies and falsehoods.

"Trump signs order designating antifa as a ‘domestic terrorist organization’"
https://www.theguardian.com/us-news/2025/sep/22/trump-executive-order-antifa-terrorist-organization

"Trump signs order targeting antifa as a 'terrorist organization'"
https://www.reuters.com/world/us/trump-sign-order-designating-antifa-terrorist-organization-2025-09-22/

Reuters "Explainer: What is antifa and why is Trump targeting it?"
https://www.reuters.com/world/us/what-is-antifa-why-is-trump-targeting-it-2025-09-22/
Is not a perfect explainer by far, but it's... not bad.

Trump signs order designating antifa as a ‘domestic terrorist organization’

Executive order revives controversial pledge from Trump’s first presidency in wake of Charlie Kirk’s killing

The Guardian
@b9AcE I now declare myself to be anti fascist. Will be having this printed on hats and t-shirts. Come join me, every one of us must show that he cannot stop us.