By Lefteris Papadimas ATHENS (Reuters) - Alexis Tsipras has presided over a near-death experience for the Greek financial system and performed a U-turn on resisting austerity. With his ministers openly discussing the possibility of a snap election, Tsipras seems nearly ready to exploit his enduring popularity in Greece and further consolidate his position after seven turbulent months in office. Tsipras's one tangible achievement has been to seal a new bailout deal for Greece, but on terms so onerous that part of his radical left Syriza party is threatening to walk out.