“Astrotweeting” is the creation of fake Twitter profiles to show support for a political candidate.
Bill White described the practice in an Texas Monthly interview about his 2010 race against Texas Gov. Rick Perry (R):
There were also some silly things that happened that are still hard to believe. One consulting firm of his created artificial people to tweet. [The campaign] wanted to question my support in the African American community, but they couldn’t recruit an African American person to do it, so on Twitter they used a stock photo of a black person. One of the people who supported my campaign clicked on the image and found out it was a singer from Atlanta. The Twitter address was registered at the same location as one of Mr. Perry’s political consultants.