The Congress on Monday hit out at the union government for the political instability and crisis in Uttarakhand, saying it was trying to "destabilise" border states."In the past 22 months, social harmony in this country has been shattered. Political stability has been undermined... Uttarakhand, a border state next to China, where a constitutionally elected government is being undermined," Congress spokesperson Manish Tewari said."The same thing happened earlier in Arunachal Pradesh again a border state with China. This government at the Centre is undermining political stability in this country by destabilising the border states," he added.The state Congress on Monday expelled former chief minister Vijay Bahuguna's son Saket Bahuguna and party joint secretary Anil Gupta for six years for "anti-party activities".Nine Congress legislators led by Harak Singh had rebelled against the chief minister last week when they sought a vote division on the floor of the house. The speaker rejected the demand.Before the crisis, the Congress had 36 legislators in the 70-member assembly. The ruling party also has the support of six members of the Progressive Democratic Front, while the opposition Bharatiya Janata Party has 28 legislators.