Dana Williamson, a top California political strategist with ties to the state’s governor, Gavin Newsom , and gubernatorial hopeful Xavier Becerra , pleaded guilty on Thursday to fraud charges, an admission that is poised to fuel other candidates’ attacks in the race. Federal authorities say Williamson conspired to steal $225,000 from a dormant campaign account belonging to Becerra, who was not named in the plea deal, and divert the money to his chief of staff, Sean McCluskie. The funds were disguised as pay to McCluskie’s spouse for nonexistent work. McCluskie reportedly took a pay cut to join Becerra when he became the US secretary of health and human services in 2021. McCluskie took a plea deal last December. Becerra has maintained he did not know about the scheme, but his opponents have sought to link him to the corruption investigation.…