Dehradun, 23 Sep: Dehradun: Former Chief Minister and veteran Congress leader Harish Rawat today led a march of farmers from district Haridwar, to stage protest at Chief Minister’s Official Residence here, but the march was prevented by the Police from reaching the CM’s residence by using barricades at different places. As the Congress workers and the farmers were stopped from proceeding toward the CM’s residence, they sat near the Police barricades put up at New Cantt Road and held their dharna there itself. Harish Rawat had arrived at the dharna spot on a tractor.