>> reporter: there's another major reason to elevate it, and it's called global climate change, skype tisesntists say the bay areas could rise as much as a foot, and that means the commuters might need a submarine to go along highway 37. >> i see what i mean? >> but so far, nobody has figured out a way to find the estimated $2 billion to build it, and when it is built, it likely will be a toll road, the money used to build the new highway 37. >> we have to look for alternatives. >> reporter: anything to end the pain. on to campaign 2016, bernie sanders easily beat hillary clinton in the caucuses in maine. it's his third have i industry in the weekend -- victory in the weekend. they debated in flint. the water problem was front and center. >> reporter: bernie sanders and hillary clinton debated in flint, michigan, to address the water crisis. >> what is going on is a disgrace beyond belief. >> reporter: the tap water became toxic with red after officials switched the supply to cut costs. investigators revealed state leaders knew about the problem, but failed to do anything about it. both can