Karat committed a blunder in 1996 when he did not agree with the proposal to install Mr. Jyoti Basu as the Prime Minister. This paved the way for the 6-year BJP rule at the Center.
Karat is again committing a second blunder by withdrawing support to the UPA Government on the Nuclear Deal issue. This will pave the way for the installation of Mayawati as the Prime Minister with BJP's support. Such support post general election would be a short lived affair. History, as it happened in UP, would be repeated. Just as the BJP withdrew support to Mayawati's Government in U.P., it would do so at the Center. The result would be instability at the Center. The 'India Shining' story would then be a thing of the past.
Thus Karat's second blunder is going to cost the Nation a collosal loss. In my view progressive Comrades in CPM don't see eye to eye with Karat. At the hustings CPI-CPM would be the biggest losers. This would bring an end to Karat's political future. He personally would lose by a huge margin.