Below I have linked the 2020 democratic nomination campaign ads. These ads were played before Feb 3rd, 2020 when the Democratic Iowa caucus took place. There were attack ads at Donald Trump as well as ads that supported candidate issue positions such as climate change. The link will take you to C-SPAN which allows you to parse through the transcript of the video and find relevant information on democrat strategies.

\https://www.c-span.org/video/?c4851474/2020-democratic-presidential-campaign-ads