Congress depends on the support of a number of coalition partners, as well as backing from non-government parties like Samajwadi that do not support the BJP-led opposition, to pass the annual budget and survive parliamentary confidence votes. But recent electoral successes for at least two of the regional parties – the Trinamool Congress, which rules West Bengal, and now Samajwadi – have fueled speculation that they might be tempted to bring down the central government in order to emerge stronger after early polls.