Mufti Muhammad Taqi Usmani: Is it a condition for the Imam to be from Quraysh?

http://www.deoband.org/2010/07/general/politics/is-it-a-condition-for-the-imam-to-be-from-quraysh/

Scholarly piece on an interesting issue. Mufti Taqi goes through various ahadith, positions of the jurists in some detail ma sha Allah