The wealthy behind the US presidential race

Individual donors to US presidential candidates can contribute up to $2,500 for state-by-state party nominating contests and another $2,500 for the general election. But independent groups called super political action committees, or PACs, have no limits on the funds they can raise from individuals, corporations or labour unions. A look at wealthy individuals who contributed at least $1 million to major PACs, as disclosed to the Federal Election Commission