Bill Shorten will blast Donald Trump today for taking politics’ ‘low road’. Picture: AP Photo/ Evan Vucci

And the Opposition Leader will urge Australia to deal with the “low road” politics and marginalised workers he says fuelled Mr Trump’s bid to be US president.

Mr Shorten last May called the Republican nominee “barking mad” on specific policy, and on Sunday condemned his boasts of sexual assault, but today goes further.

“But I know I am not the only one relieved that with every passing day, with every disgusting, demeaning comment Mr Trump makes, the possibility of him being president fades,” Mr Shorten says in a speech prepared for a CEDA conference keynote address.

“By his own words and his own actions, he has confirmed the worst fears of millions in the United States and beyond its borders — he is entirely unsuitable to be leader of the free world.”

The Labor leader says the Trump bid was a “campaign that began as a de facto reality TV show, grew into a circus and has now gone beyond farce”.

Bill Shorten will take aim at Donald Trump today. Picture: Kym SmithSource:News Corp Australia

Linking Mr Trump’s support to the sentiment behind Britain’s Brexit vote, Mr Shorten says both were powered by “the people who have felt the rough edges of globalisation and economic change”, and had been “outsourced, downsized, rationalised”.

They were from families facing flat wage growth, widening inequality, and falling living standards.

They were “marginalised, alienated groups being told that migrants, minorities, ‘big government’ are to blame”.

“That’s the low road of change — lashing out, scapegoating,” Mr Shorten says.

“We need to take the high road — skilling our people, investing in education, addressing inequality, promoting inclusion.”

Bill Shorten has previously described Donald Trump as ‘barking mad’. Picture: AP Photo/ Evan VucciSource:AP

Mr Shorten says to win the argument against low-road politics required overcoming “the false choices and simple solutions of us-versus-them”.

And he warned that economic change and references to innovation were alarms for insecure workers.

“That when many Australians hear the call for ‘flexibility’, they believe our system is good at flexibility for employers, but not so good at flexibility for employees,” he says.

“That many Australians know the calls for a low-wage, easy-to-hire, easy-to-fire system will not deliver hundreds of thousands of new jobs.”