Here we go

The Trump shooter was nominally a registered Republican.  That means nothing;

...However, when he was 17 he made a $15 donation to ActBlue, a political action committee that raises money for left-leaning and Democratic politicians, according to a 2021 Federal Election Commission filing. The donation was earmarked for the Progressive Turnout Project, a national group that rallies Democrats to vote.

This person was not a legitimate Republican.  He likely registered as a Republican so he could pull of  his heinous attack with less difficulty.

But the media will twist this as they always do. They are not above using that to dull the critiques of their vile, violent anti-Trump narratives. They have no scruples.