Orange County Board of Supervisors candidate Katrina Foley has outraised her competitors vying for the vacant District 2 seat, documents showed as the special election campaign reached its final week. Foley, Costa Mesa mayor, received a total of $397,771 in contributions from donors since the beginning of the year, according to documents filed on the Orange County Registrar of Voters’ website. Jackie Wu, community outreach manager for the Orange County Registrar’s Office, said candidates have a donation limit of $2,100 from a single source, regardless of whether it’s from an individual or an organization. The second-largest receiver of donations was Fountain Valley Mayor Michael Vo, who accumulated $216,841 this year, as of Feb. 20. Former state senator and supervisor John Moorlach received $132,321 in donations during the same time period. In fourth place for fundraising was Newport Beach Mayor Pro Tem Kevin Muldoon, who has received $64,085 to finance his campaign. Janet Rappaport, an international tax attorney …