Spencer Pratt has emerged as a fundraising force in the Los Angeles mayor’s race — outpacing incumbent Karen Bass in the first filing period of the year. Pratt, a former reality TV star on the MTV show “The Hills,” has raised nearly $540,000 since January in campaign disclosures reported this week to the city’s Ethics Commission, according to the Los Angeles Times . The haul puts Bass on notice as the campaign enters its final stretch before the June 2 primary election. The Republican’s