From the source 2/25 -
The Koch brothers give millions to such groups, including the Americans for Prosperity, which has a Stand With Walker website and TV ad.
"The eyes of the entire nation are on you today," Tim Phillips, the group's president, told a recent pro-Walker rally.
The Koch brothers provided the seed money for Americans For Prosperity a decade ago — and more than $1 million overall.
"Five years ago, my brother Charles and I provided the funds to start the Americans for Prosperity," David Koch said at an AFP rally in 2009. "And it's beyond my wildest dreams how AFP has grown into this enormous organization."