Joshua Rosenstein was quoted in article on Open Secrets about lobbying donations for presidential candidates in the Senate:

“Both [Paul and Sanders] have publicly decried the influence of corporations in American public life,” Joshua Rosenstein, a Washington, D.C.-based lawyer and expert on lobbying, said. “If you are a corporation, is it possible that you view each of them as relative lost cause? Sure.”

…

Despite that fact that making contributions may be good for business, Rosenstein noted, many lobbyists also donate for ideological reasons.

“While they certainly have to be pragmatists about what they’re doing…and that certainly drives some of the giving,” he said, “there might very well be an equal or greater ideological segment of the lobbying community that aren’t driven by pragmatic reasons,” Rosenstein said.

The article in its entirety can be found here.