They have not yet decided whether to intervene in Republican primaries, people involved in the discussions say. But the brothers want their network to play a bigger role in cultivating and promoting Republican candidates who hew to their vision of conservatism, emphasizing smaller government and deregulation more than immigration and social issues. They are also seeking closer control over groups within their network, purging or downgrading those that did not deliver last year and expanding financing for those that performed well…

“We’re looking into some of that cutting-edge technology,” said Evan Feinberg, a former aide to Mr. Paul who is now president of Generation Opportunity, a Koch-financed group focusing on young voters. “Obama for America did some really interesting things to connect to young people. We want to use some of those same ideas and try to learn from them.”

Efforts are also under way to replicate the Democrats’ voter registration organizations, which Koch advisers believe have leapfrogged those of conservative and Republican groups. And much like other conservative groups, those in the Koch network are preparing new initiatives aimed at Hispanic voters, who they believe will be attracted to a small-government message unburdened by the hard-edged social conservatism that hamstrung Republican candidates in several critical races last year.