The attempt on Reagan's life earned him sympathy from across the mainstream political spectrum (the extreme left excepted).
But 2024 is not 1981. I doubt Trump is a martyr to half the country. That half wishes Trump had been killed.
The “election” of Trump was not helped one iota from this assassination attempt unless the voting is fair which many believe still is not. The only difference now is to make more Trump votes disappear and manufacture more for Biden (or whomever they put in his place) by ballot stuffing, Dominion or by whatever means necessary.