The charts above are from the Change Research Poll. It shows Biden with a 10 point national lead, and a lead in six important battleground states.
Change Research conducted a poll of 4,332 likely voters July 10-12, 2020 across 6 competitive battleground states: Arizona, Florida, Michigan, North Carolina, Pennsylvania, and Wisconsin. A companion national survey of 1,258 likely voters was also conducted July 10-12, 2020. Unless otherwise stated, the results presented in this analysis are among battleground state voters. The margin of error, as traditionally calculated, is ±1.49% for the battleground and ±2.76% for the national poll.