Socialist BSP is expected to announce today whether or not it will accept the invitation of NDSV to form a coalition cabinet. NDSV, mandated to put together Bulgaria's new cabinet after BSP's would-be coalition government with DPS failed to secure the necessary votes in parliament last week, has proposed to the socialists to nominate the prime minister. The response of the socialists will probably be influenced by the noise coming out of BNS, the smallest parliamentary group. On Friday, BSP leader Sergei Stanishev made it clear that his party and DPS should welcome a third partner in their alliance to avoid early elections. Analysts have tipped BNS as the most likely candidate for the vacant spot. 'Our goal is a [constitutional] majority of 160 votes,' said BNS co-leader Stefan Sofianski after meeting with NDSV representatives on Monday. That would face BSP with the dilemma of whether to make a compromise and accept the hand extended by NDSV or snub it, hoping that when the president mandates another parliamentary group to form the government, it could lure the BNS votes for a socialist-led cabinet. NDSV indicated on Monday it was willing to tolerate DPS' presence in a three-way coalition government with BSP for as long as it has any chance of being voted into office. If BSP, NDSV, DPS and BNS get behind a coalition agreement, the most likely candidate for prime minister would be a moderate like former presidential adviser Ivailo Kalfin. He was already nominated for the post of deputy prime minister in the failed BSP/DPS cabinet. Several Socialist MPs said Tuesday that a coalition with centrist Simeon II National Movement was rather unlikely. Later during the day, the Socialist Party should announce their final decision on whether they will join SIINM in a ruling coalition.