New Delhi, Oct. 1 -- Prime Minister Narendra Modi dialled US President Donald Trump on Wednesday to assess cooperation in key areas such as trade, energy and defence and to discuss regional and global issues against the backdrop of New Delhi's concerns over a US sanctions law on Russia. India has said the Lindsey O Graham Sanctioning Russia and Iran Act, which gives Trump the power to impose tariffs of up to 100% on the top five purchasers of Russian oil, can have implications for bilateral relations and the global energy market. Concerns about the US law have grown at a time when India and the US remain engaged in negotiations on a bilateral trade deal. Modi described his conversation with Trump in a social media post as productive and sai...