From NPR:

A lot of Americans don’t trust the electoral system despite massive efforts by government officials to tighten security and boost voter confidence. This is according to a new poll by NPR, PBS NewsHour and Marist. The poll finds deep partisan divides over what threatens U.S. elections, whether it’s foreign interference, disinformation, suppression or fraud, and many blame President Trump for not doing enough.

Here is a link to an interview of Pam Fessler who covers voting issues for NPR.