The full quote is “What you proved tonight is that dollars don’t vote – you do.” See
David Brat defeated Rep. Eric Cantor in the primary for the Republican nomination for the U.S. House District 7 in Virginia.
What was really proved is that elections are determined by who shows up and who doesn’t show up.
See also Politics: Don Givadam wins again.
I would like to amend my advice about voting with a more positive spin:
Always vote because every vote always counts. If you stay away you give the election away.