In the last year, the candidates who are still in the race to be the Democratic nominee have collectively aired 130 unique ads for a total of 570,104 airings. Most of these ads have been positive and some have contrasted candidates against their competitors or Donald Trump. Joe Biden is the only candidate in the race who has gone completely negative so far, with an ad about Donald Trump that aired from 12/10/19-1/4/20. Watch it here.
Below is a closer look at each advertiser and the number of times they have aired positive, negative, or contrast ads.
*Please note, all data is current as of 10:00am Eastern Time on Friday, January 17, 2020.