Altered boundaries, retirements and the new 'top two' primary system make the state's House races more competitive and more expensive — at least $1 million per candidate in 11 cases.WASHINGTON — California congressional races rarely drew the big bucks that more competitive races in other states did — after all, only one seat in the state had flipped between the parties in the last decade — but that was before new district boundaries shook up the political status quo.