Harm to national unity :
Many parties are included in coalition government. These parties by mutual discussion set a joint programme because ideologies and theories differ from party to party. These alliances, to get power, overlook their ideological differences. In alliances the number of regional parties are more than national parties. So their effects are increased in alliance and P.M. is forced to come under their pressure. For example, in last UPA government, Trinmul, a regional party of West Bengal (Mamta Banneiji) opposed the P.M. and P.M. Manmohan Singh and he remained in pressure. Due to excess pressure of local parties’ interests, national interests get disadvantaged.
