Derek Gatopoulos

Left-wing Greek Prime Minister Alexis Tsipras sought his party's backing for a harsh new austerity package Friday to keep his country in the euro — less than a week after urging Greeks to reject milder cuts in a referendum.

With his country struggling to stave off financial collapse, Greek Prime Minister Alexis Tsipras will try to convince European creditors to agree on a new bailout program when they meet Tuesday for an emergency eurozone summit.