A Pew Research Center survey conducted in September found that 60% of Americans say gun laws should be tougher, up from 57% last year and 52% in 2017.
https://www.npr.org/2019/10/20/771278167/poll-number-of-americans-who-favor-stricter-gun-laws-continues-to-grow
Support for an assault weapons ban varied greatly along political lines, with 81% of Democrats, 55% of independents and 33% of Republicans in favor.
https://abcnews.go.com/US/numbers-show-americans-opinions-gun-control-measures/story?id=84995468