Ahead of a crucial primary in Pennsylvania, Democratic Presidential hopeful Hillary Clinton has said that if she were in the White House and Tehran attacked Israel with nuclear weapons, Washington would 'totally obliterate' Iran.

Clinton was asked what she would do if Iran attacked Israel with nuclear weapons in an interview on ABC's Good Morning America programme, Ynetnews reported.

"I want the Iranians to know that if I'm the President, we will attack Iran," she replied, adding, "In the next 10 years, during which they might foolishly consider launching an attack on Israel, we would be able to totally obliterate them."