Here's a suggestion

For a political candidate to gain some "non-elitist" and most importantly NON-JACKASS points with the the public IMO. It is not a big thing, but I cannot see how it would not garner positive press.

State you will NOT accept corporate or non-disclosed donations to your Presidential Library...

...HELL go all the way and promise YOU WON'T HAVE A PRESIDENTIAL LIBRARY! Turn all that shit over to the National Archives, open to the public, and be done with it.

Each successive President builds a gaudier, and frankly, bullshitier library. Though it is going to be hard to top the George W. Bush Library for sheer worthlessness and wasteful gaudiness:

Bush advisers say they plan to consult historians but will rely chiefly on the veteran design firm they hired to create a museum to showcase his life, works and policies.

Some who’ve studied presidential centers say the lack of independent voices in the design-exhibit process risks turning the library into little more than a promotional venue.

How fitting that the worst President, gets the Presidential Library without an actual, you know, library.

C'mon Barack, Hillary, McSame, promise me you WON'T BUILD A GIGANTIC PIECE OF SHIT DEDICATED TO YOU!