The American President Trump has brought huge online traffic to Journalismgiven journalists so much content to work with. The American President Trump has given journalists so much content to work with.

"Online traffic" doesn't really fit here, as that just means a bunch of people using the internet. I'd say "content" would be a better word to choose, since it's stuff that the journalists can use to write their articles. This is how I'd phrase it, though there's probably other ways.

Journalism workerts would definitely appreciate Trump, who is always a world-class topic creator. Journalists would definitely appreciate Trump, who is always a world-class topic creator.