democrats are happy to play there. >> reporter: you didn't even have to go inside the capital to know where the day's political battle lines were drawn. >> hands off my medicare. >> reporter: democrats enlisted seniors to help rail against the republican budget. >> they are out to destroy social security, medicare, and medicaid. there is a time to draw a line in the sand and fight. >> reporter: the house republican budget calls for trillions of dollars in spending cuts in part by overhauling medicare, creating a new system where seniors buy their own subsidized private insurance. >> biggest threat to medicare, status quo. medicare goes bankrupt in nine years. >> reporter: paul ryan argued vigorously for his plan. >> more importantly, we save medicare, prevent bankruptcy, and what does the other side do? they sit by and watch the program go bankrupt. >> reporter: every single