I thought this was interesting. The top chart shows the likely votes that Donald Trump and Howard Schultz could get if the election was held today. The second chart does the same thing for the most likely Democratic candidates. Note there is only one candidate that has more likely votes that not likely -- Joe Biden.
This does not mean someone else could get elected -- only that right now (about 22 months before the general election), Biden appeals to the most people among the general public. We'll just have to wait and see if some other people can win over most voters.
The chart below shows what Democrats think of their most likely candidates.
These charts reflect the results of a recent CNN / SSRS Poll -- done between January 30th and February 2nd of a national sample of 1,011 adults, with a 3.8 point margin of error.