Latest from US Presidential Election

Editorial: Trump attack sign GOP out of patience

No precedent exists for the success so far of Donald Trump, who has been neither a state governor nor a member of Congress.

Watch: Trump responds to Romney at Maine rally

Donald Trump is responding to Mitt Romney's evisceration of him by noting that that the 2012 GOP presidential nominee begged for Trump's endorsement.

Klan never far from US politics

Trump has put KKK back in spotlight but group has been trying to influence elections for a long time.

Vote: Would Trump make a good president?

Watch: John Oliver calls Donald Trump a 'liar' on Last Week Tonight

Refusal to denounce KKK panders to racist element

COMMENT: Every day it is less surprising that Trump does best in the areas of the country with the most racist Google searches.

Sanders runs into perfect storm

Clinton finds her comfort zone in deep south

Finally, a poll that puts Sanders out in front

NBC and the Wall Street Journal casually tossed a bombshell into the political world with a poll showing Ted Cruz with a slight lead in Republican polling.

Great race most gripping it's ever been

South Carolina and Nevada are but a few days away. I have never been so immersed in the American presidential race, writes Mike Hosking.

Obama: 'Trump will not be president'

"I continue to have faith in the American people. And I think they realise that being president of the United States is a serious job. It’s not hosting a talk show," Obama said at a news conference in Rancho Mirage, California.

Karen Tumulty: Judge's death puts focus on court

The unexpected death of Justice Antonin Scalia has left it deeply divided along ideological lines, much as the US is, writes Karen Tumulty.

Larry Williams: Trump is on a roll and I love it

Sanders beat up Hillary Clinton rather badly, but Clinton still walked away with more delegates to take to the Democratic national convention, writes Larry Williams. Tell me that's not a little dodgy.

Paul Thomas: American election ain't over till the fat lady sings

The meaning of the New Hampshire primary is that Americans are in open revolt against the system, fear of the future and rage against economic inequality.

Bryan Gould: A socialist for US President? How unlikely

Senator Sanders' age and relative obscurity would in any case count against him, but the real disqualification, it is believed, is that he is a self-declared socialist, writes Bryan Gould.

Paul Little: Senility and lack of brains no bar

Much fun has been had at the expense of the US Republican Party candidates for the presidential nomination over the fact they're all bonkers.