Everybody is using Social Media nowadays. You, me, our grandparents, the dog down the street, lab-rats, the works! Now even politicians are starting to use it! Here are a couple reasons why Politicians have opened up their minds to Social Media outlets:
Provides transparency and credibility
Highly targeted and inexpensive ads
Politicians can let the people be their voice
Allows some to improve public service
Provides campaigns with calculated political strategies
These are all similar reasons as to why businesses should be using Social Media as well! It is a way to connect with people, and a way for people to connect with brands (in this case the next mayor/governor/senator). Here is some more information about how Politicians and campaigns are using Social Media.