According to an article from AARP, and number of the current political candidates are caregivers themselves. 
For example, Hillary Clinton’s mother lives with her in her Washington, DC home, and, Elizabeth Edwards, wife of American Democratic presidential hopeful, John Edwards has aging parents in long term care.
I have no idea how that fact may or may not shape their policies, but, I like seeing how they are real people who face some of the same things we do. Even though they may have more resources than we regular folks have, there is a universal emotional and time impact that caring for an aging parent enacts.