By Albin Sybera Former Czech premier Andrej Babis has ended weeks of speculation by formally declaring his candidacy for the Czech presidency. The news came as a surprise after the controversial populist billionaire had scattered hints in recent months that he would propose another member of his party to stand, as opinion polls showed that he would likely lose a run-off in the January election against the leading candidate, former General Petr Pavel. The move may indicate that Babis plans to mount a populist campaign to exploit the ongoing cost of living crisis and resentment among some Czechs…