<prompt> Translate the following text to EnglishChama cha Congress kilipata tena madaraka baada ya Rajiv Gandhi kuuawa na mpiganaji wa kujiua wa Tamil wakati wa kampeni za uchaguzi mwaka 1991.  <response>: The Congress Party regained power, however, following Rajiv Gandhis assassination by a Tamil suicide bomber during election campaigns in 1991. 