In west Bengal Communists established their cadre to ensure that everybody votes for them and them only, that is why it is difficult to dislodge communists from WB.
In Nepal Maoists established their armed groups in every constituency and used these groups to pressurize electorate to vote in their favour. That is how they came to power.
Communists are interested to ensure that weak leaders to rule the centre, so that Maoists/ Naxalites are able to spread their wings in the country, so that Nepal experiment can be repeated.
They know that US is going to ensure that communists do not come to power in India and hence Communists will try to scuttle any efforts to build strong relations with US.
