Insurgent conservatives seeking to pull the Republican Party to the right raised more money last year than the groups controlled by the party establishment, whose bulging bank accounts and ties to major donors have been their most potent advantage in the running struggle over the party’s future, according to new campaign disclosures and interviews with officials.

The shift in fortunes among the largest and most influential outside political groups, revealed in campaign filings made public late Friday, could have an enormous impact on the 2014 election cycle. The warring Republican factions are preparing to square off in a series of Senate and House primaries around the country as Republican leaders seek to rein in activists who they believe have fractured and endangered the party with policies that alienate independent-leaning voters.

Groups representing the party establishment, like Karl Rove’s Crossroads, are struggling to bring in the level of cash they raised in 2012, when Crossroads spent more than $300 million in a failed effort to defeat President Obama and retake the Senate, leaving donors grumbling that their dollars had been wasted.

Meanwhile, insurgent conservative groups like the Tea Party Patriots — emboldened by activists’ fury over compromises that Republican leaders have struck with Democrats on federal spending — now have formidable amounts of cash to augment their grass-roots muscle.