Larry Bulman, the Saratoga County Democratic Committee chairman, said he will be supporting Thompson in the upcoming race.
"Shawn's done a great job, a fabulous job here in the city," he said.
"There's nobody in this county that has led a local political party that has done a better job than Shawn."
Southworth is also touting a Democratic rise in his area; his wife, Patti Southworth, won the position of supervisor in the Town of Ballston last election cycle.
Thompson attributes such a win as the result of work done on the county level.
"I help people like Pat Southworth pave the way for success in their communities," he said.
Thompson currently works in the State Legislature with Malcolm Smith (D-Queens), the minority leader. He also worked with Gov. David Paterson's staff when he was senate minority leader.
"With the relationships I have with people, I'll be able to get Saratoga County's voice heard," said Thompson.
Southworth doesn't think that's enough for Saratoga County Democrats. "If he's so intricately connected, why don't more regular Democrats know about him, the people he represents?" said Southworth. "They need to know there's somebody they can contact and go to.""