Former Prime Minister Francois Fillon, the new front-runner in France’s 2017 presidential election, is offering voters an economic-policy revolution inspired by Margaret Thatcher. Fillon, 62, vaulted from third position in most polls to win the first round of the Republican primary by 15 percentage points from the veteran Alain Juppe on Sunday with the most free-market platform among the seven candidates. They’ll face each other again in next Sunday’s runoff and the winner will be favorite to become president in May 2017.