These charts are from the Public Religion Research Institute. They questioned 54,357 people between January 3rd and December 30th of 2018. The poll had a margin of error of 0.4 points.
The top chart shows the number of Americans wanting abortion legal in all or most cases, and compares it to 2014. The second chart makes the same 2014 to 2018 comparison, but breaks it down by political party.
The second and third charts show the results for 2018 only -- the first among all religious groups, and the second on how many in each state want abortion legal in all or most cases.