Another theory of the case is that “the left” only helped Trump by prosecuting him. The prosecutions supported his martyrdom narrative and consolidated support for him among moderate Republicans. One of the other alternatives might have won the primaries otherwise.
The argument that the prosecutions helped Trump in the primaries is undoubtedly correct. “The left,” however, did not bring these cases against him. Those decisions were made by a few specific individuals; I wasn’t consulted. To the extent that “the left” had an opinion on the matter, it was equivocal at best.
In the end, the prosecutors in question had to make a horrible choice between making America look like a banana republic and elevating Trump above the law. They decided the latter was more dangerous, and with good reason, John Roberts notwithstanding. We’re about to find out why.