The man who shot Donald Trump in the ear was identified as Thomas Mathew Crooks, a 20-year-old man who was a registered Republican. Although he made a small donation to the Democratic party at one point. The idea that he was Republican turned Democrat, or democrat turned Republican is all up to opinion. Many would argue why would a Republican shoot his parties President. And many would argue why would a democrat be so invested into guns and ammunition and be a registered Republican.
In this article, What happened to the guy who shot Trump in the ear? What to know It states he did not have any strong political leaning. And that he was a registered Republican but also made a donation to a Democrat turnout organization. Which is very contradicting. In this Article, CBS News investigation: The secret double life of Thomas Crooks, Trump’s would-be assassin It states he bought a rifle from his Dad and became very invested in Guns and Ammunition.
Biases with these sources would be the fact that CBS is typically left leaning. And USAToday is more middle. But I do not believe this can affect the outcome of the facts stated by both the articles. The evidence to support that a MAGA supporter did not shoot Trump would be the fact he donated to a Democrat Turnout organization. And the evidence to support he was a MAGA supporter would be the fact he was a registered Republican.
Conclusion: There is not enough evidence to support this claim. Whether or not he was a MAGA supporter is all based on opinion as of now. We might not ever find out because he is no longer with us. So, it is up to the people's opinion to believe what he actually was, with the information we have.