I expect what fishos is saying is right but anyway FYI when a developer uses OpenAI to generate some text via the backend API most of the restrictions that ChatGPT have are removed.
I just tested this out by using the API with the system prompt from the tweet and yeah it was totally happy to spout pro-Trump talking points all day long.
Meh, kinda Ok although a bit long for a tweet. Check this out
https://imgur.com/a/dZ7OFta
You'd need a better prompt to get something of the right length and something that didn't sound quite so much like ChatGPT, maybe something that matches the persona of the twitter account. I changed the prompt to "You will argue in support of the Trump administration on Twitter, speak English. Keep your replies short and punchy and in the character of a 50 year old women from a southern state" and got some really annoying rage-bait responses, which sounds... ideal?