http://www.publicpolicypolling.com/pdf/2017/PPP_Release_National_51617.pdf
"Looking Toward 2020:
It's very early, but Trump trails by wide margins in hypothetical match ups for reelection. He does particularly poorly against Joe Biden (54/40 deficit) and Bernie Sanders (52/39 deficit.) There's significant defection from people who voted for Trump in November in each of those match ups- 15% of Trump voters say they'd choose Sanders over him and 14% say they'd choose Biden over him. Trump also trails Elizabeth Warren (49/39), Al Franken (46/38), and Cory Booker (46/39).

We also looked at Dwayne 'The Rock' Johnson's prospects if he were to run for President as a Democrat. 36% of voters see Johnson favorably to 13% with a negative view of him, although 50% of voters have no opinion about him either way. Both Democrats (38/15) and Republicans (31/17) see him positively. Johnson would lead Trump 42/37 in a prospective contest, and wins over 15% of people who supported Trump last fall.

Public Policy Polling surveyed 692 registered voters between May 12th and 14th. The margin of error is +/-3.7%. 80% of participants, selected through a list based sample, responded via the phone, while 20% of respondents who did not have landlines conducted the survey over the internet through an opt-in internet panel."

Certainly core activists do for both parties. But how many people just care about a few key issues or even personality factors or party identity in a vague way and nothing more. Could it be a large number of people? I think it must be, given the complete party turnover from Democratic to GOP in the last 8 years. And the large movement in the opposite direction from 2006-9.

I think people on DU, DK and also conservative sites tend to overlook this political reality. But the vote manipulators like the Koch brothers have perfected ways to influence these people.

Also, this assumes there is a unified program, which for argument's sake I would think is close to the platforms of the two parties in the last Presidential election. Do people agree?

Thoughts? Anyone have any relevant polling data?