Former Saratoga County Assistant District Attorney David Harper formally declared his candidacy against Rep. Scott Murphy, D-Glens Falls [for the NY-20th Congressional seat]. “I’m running for Congress to put an end to the out of control spending and fiscal irresponsibility that dominates Washington and is ruining our economy,” Harper, of Saratoga Springs, said in a press release sent Sunday afternoon. He said last week he was interested in the seat, and has now created a campaign committee with $50,000 of his own money. Republican leaders have asked prospective candidates to formally declare their intentions by March 7. Harper joins Dan Stec, the Queensbury town supervisor, in doing so.