The field for the 1st Congressional District seat vacancy created by Tim Scott’s promotion to the U.S. Senate continued to grow on Tuesday.

Former state Sen. John Kuhn formally announced his bid Tuesday afternoon. Kuhn represented parts of Charleston and Berkeley counties in the S.C. Senate from 2001-04.

Kuhn, 50, is an attorney living in downtown Charleston.

“We need someone with a strong business background who will work hard to cut the budget, yet continue to provide the funding necessary to keep up with Charleston and Beaufort counties’ terrific growth,” Kuhn said in a statement.

Also vying for the seat will be Sullivan’s Island businessman Keith Blandford.

“Now that Tim Scott has been named as Senator DeMint’s successor, the feedback and encouragement our campaign has received to pursue Scott’s seat has been overwhelming,” Blandford said in a news release.

Blandford, who last month had announced his intention to oppose Republican Sen. Lindsey Graham in the primary, said he will try to run on the Republican ticket and also will pursue the Libertarian party’s nomination.

“We sincerely believe that the 2014 senatorial seats should be challenged in a primary, but we are confident that this is the best move for our team and our state,” Blandford said in the release.

Democrat state Rep. Wendell Gilliard, who represents parts of downtown Charleston, also announced Tuesday he is exploring a bid for the seat.

“The primary question for Rep. Gilliard is this: ‘Can a Democrat with the full support of their state and national party win the 1st Congressional District seat?’ ” he said in a statement today.

Scott was picked by Gov. Nikki Haley on Monday to fill the vacancy created by Republican Jim DeMint’s resignation.

By some counts, the field of those interested in the open seat could reach 10 or more.