Yes. True. Regionalism is the main cause for the differences between states. When the states are ruled by national parties the differences are resolved where as if the ruling party of any of the two is a regional party or a government supported by a regional party, the problem gets aggravated further. It is high time the national parties especially the Congress and BJP came together atleast to eliminate such regional parties which are threats to Indian unity. A tie up in Punjab,UP and Maharastra will certainly eliminate Shiv Sena, Akali Dal , Bahujun Samaj and Samajwadi parties.