How Expensive Will the "Most Expensive Election Ever" Get?

Presidential hopeful Donald Trump is going back on his promise to pay for his own campaign, saying he needs $1.5 billion for the general election. Democratic candidate Bernie Sanders isn’t getting as many $27 donations as he was, and Hillary Clinton’s fundraising machine continues to raise more than both Trump and Sanders by double-digits. In California, some big money is starting to flow into the senate race. We look at how much money is at stake in the most expensive election on record.