It's not really "much of the left" that is against it, just the loudest voices. Pew research says [1 sorry for the ugly URL]

Support for photo ID requirements also remains widespread in both parties. More than nine-in-ten Republicans (95%) and about seven-in-ten Democrats (71%) favor requiring all voters to show government-issued photo identification to vote.

[1] https://www.pewresearch.org/politics/2025/08/22/majority-of-...