ISLAMABAD- Special assistant on national affairs, Irfan Siddiqui, has said constitution is in place and no step alien to constitution will be taken. He said this in a statement issued today. He held that Nawaz Sharif had been recognized as Prime Minister (PM) in parliament. Imran Khan has every right to make demands, he said, adding that Imran Khan was himself a political player. It should be well known to him that if someone demands that he should resign from PTI, he would not do so. All the demands from Imran Khan and Tahir ul Qadri will be considered after filtering them in sifter of the constitution, he remarked.