Since its accession to power in Egypt, the Muslim Brotherhood has adopted a policy of exclusion rather than inclusion in the building of the post-revolution regime. It wants to shape Egyptian society according to its own conception of Islam.
Because the Muslim Brotherhood's victory — and hence the president's win — was achieved by a slight majority of the votes (in a low election turnout where those not voting became known as members of the “couch” or “abstention” parties), Brotherhood members consider this their opportunity to freely shape the new regime whichever way they wish.