New Delhi, July 7 -- Rashtriya Janata Dal (RJD) MP Manoj Jha has approached the Supreme Court alleging that the decision of Election Commission of India (ECI) to undertake a special intensive revision (SIR) of electoral rolls in Bihar is a tool of "institutionalised disenfranchisement" that will disproportionately target Muslim, Dalit and poor migrant communities in a state where elections are to be held later this year. The challenge forms the latest in the line of several petitions filed in the top court challenging the ECI's June 24 order. After non government organisation Association for Democratic Association (ADR) and political activist Yogendra Yadav filed petitions on Saturday, pleas have also been filed by Trinamool Congress MP Mah...