Romney under fire over tax returns

Democrats launched co-ordinated attacks against Mitt Romney, intensifying calls for him to explain his offshore bank accounts and release several years of tax returns.

The offensive came as the presumptive Republican US presidential contender privately raised millions of dollars from New York’s elite.

The line of attack, described by Mr Romney’s spokesman as “unseemly and disgusting”, follows new reports that raise questions about his personal wealth, which could exceed $250m.