Republicans are growing increasingly frustrated with Sharron Angle and her lackluster campaign to unseat Senate Majority Leader Harry Reid (D-Nev.), fearing she is jeopardizing what they had long viewed as a sure pickup and costing them a chance to reclaim the majority.

Senate Republicans quietly acknowledge that Angle's controversial views on some issues remain a political liability. But the former Nevada Assemblywoman's larger problems are a progression of unforced errors stemming from a lack of campaign experience and an amateurish staff incapable of offering her the necessary guidance. However, Angle has proved to be adept at fundraising, corralling $2.6 million in the second quarter.

Republicans are reluctant to openly criticize Angle, not wanting to cause their...