Park City, Utah (CNN) Republican fund-raisers are beginning to fret that Donald Trump does not comprehend the magnitude of the challenge before him, warning that if he fails to execute the basic tasks of fund-raising during a critical six-week stretch, he will find himself badly outgunned this fall. Over barbeque dinners and en-suite receptions on the grounds of this five-star retreat nestled in the Wasatch Mountains, associates of Mitt Romney's $1 billion presidential campaign swapped concerns with one another that Trump is failing to play catch-up quickly enough. There is hope that Trump can reverse fortunes with a fund-raising swing that began this week, but Republicans worry that he is poised to squander the weeks leading up to the GOP convention.Trump has half a year to amass a major fund-raising operationRepublicans here stress that the alarm bells have not yet rung
_'s campaign didn't respond to a request for comment for this story Friday afternoon. A joint fund-raising agreement was hatched last month to split proceeds between the RNC and the _ campaign. And another problem for Trump fund-raising: The _ who did it best indicated this weekend largely signaled an unwillingness to pitch in. _ will win "with or without your help," Priebus told attendees on Saturday morning, according to a person in the room. I don't think that's happened for Donald Trump," Zwick said, noting that many people on _'s finance team lack longterm loyalty to his campaign.