On The Issues (Check out their ideological map and see where you stand!)Every Presidential candidate on every issue! Tons of data!
Politics 1.comTons of election information, even based on state!
Vox on the candidates
Latest 2020 polls from Real Clear Politics
I Side With: Polls of the 2020 race
The Skimm: Road to 2020
UV's Center for politics (Sabato's crystal ball)
270 to win (2020 election map)
Politico 2020 elections
Five Thirty Eight: The 2020 race
...and more to come!