Mitt Romney won the Republican presidential nomination as a “turnaround man,” whose capacity to reinvent companies, and the 2002 Olympics, could be transferred to the nation and its troubled economy.

President Barack Obama has launched a tough new tax-equality pitch in a TV ad asserting that Republican rival Mitt Romney’s economic proposals would mean cuts for the wealthiest Americans and higher bills for everyone else.

US Republican presidential challenger Mitt Romney is trying to deflect questions about his record as a businessman who has kept part of his vast fortune in overseas accounts.