During the tenure of the George W. Bush administration, relations between India and the United States were seen to have blossomed, primarily over common concerns regarding growing Islamic extremism, energy security, and climate change. George W. Bush commented, "India is a great example of democracy. It is very devout, has diverse religious heads, but everyone is comfortable about their religion. The world needs India". Fareed Zakaria, in his book "The Post-American World", described George W. Bush as "being the most pro-Indian president in American history." Similar sentiments are echoed by Rejaul Karim Laskar, a scholar of Indian foreign policy and ideologue of India's Congress Party – the largest constituent of the UPA. According to Laskar, the UPA rule has seen a "transformation in bilateral ties with the US", as a result of which the relations now covers "a wide range of issues, including high technology, space, education, agriculture, trade, clean energy, counter-terrorism, etc".