Herman Cain to make White House campaign announcement

US Republican Herman Cain is expected to announce on Saturday whether his run for the White House will continue.

The Georgia businessman has been under mounting pressure to quit following an adultery allegation, which he denies.

He discussed with his wife, Gloria, on Friday whether to press on with his campaign, which has also been rocked by sexual harassment claims.

The former pizza executive has gone from obscure longshot to unlikely frontrunner to tabloid fodder.

While Mr Cain's ratings have slumped, support for former House of Representatives Speaker Newt Gingrich has surged.     More