"External Affairs Minister Sushma Swaraj is doing a wonderful job. Nothing illegal, nothing immoral has been done. Let us not try to politicise issues, which are done on humanitarian considerations," Naidu told reporters here.
The senior minister's statement came in the wake of the opposition parties escalating its attack on the government and demanding resignation of Swaraj for "aiding and abetting" the fugitive former IPL commissioner Lalit Modi.
The genesis of the controversy was disclosure of emails showing that she had spoken to Indian-origin British MP Keith Vaz and its High Commissioner here James Bevan favouring the grant of travel documents to Modi to go to Portugal, purportedly for treatment of his wife's cancer in June last year.
Modi, who is wanted in India, has made London his home since 2010 to avoid a probe for alleged foreign exchange regulation violations in the T20 cricket tournament held in South Africa in 2009.