Hollywood isn't the only place in California with lots of campaign money. The Bay Area also has many deep pocket donors -- especially in the Silicon Valley, the home of many tech billionaires.

Elections come and go and many issues change, but one seems to remain: electronic voting. Two years ago, four years ago, eight years ago -- the story's been about the same: the machines don't seem ready for primetime, but we're using them anyway.

Find out who tops the list of top contributors to so-called super PACs through the end of March.

In 2008, bankers and traders were among Obama's big donors. This year, many are now embracing Romney.