Charles and David Koch, the billionaire brothers who back conservative causes and candidates, say they believe Wisconsin Gov. Scott Walker is the best hope for Republicans to regain the White House, The New York Times reports.
"We will support whoever the candidate is, but it should be Scott Walker," David Koch reportedly told a fundraising event for the state GOP in Manhattan on Monday.
Koch made the statement at the Union League Club before dozens of New York state's top political donors just after Walker had addressed the group, the Times reported.
Koch reportedly implied that their Americans for Prosperity and Freedom Partners groups would not back a particular candidate in the primaries, though they may do so personally.
Still, the endorsement is seen as the possible end of one of the so-called "invisible primaries," in which GOP candidates have courted the backing of the Kochs, the Times noted.