If Trump is impeached, can American politics regain the trust of the voting public? Either way, there is no guarantee that the Democrats will win the 2020 election. Pat Buchanan, author and former adviser to presidents Richard Nixon and Ronald Reagan. Eleanor Clift, columnist with The Daily Beast and a contributor to MSNBC.

Also, with the benefit of hindsight: Jacques Chirac had one of the longest political careers in Europe, but he may best be remembered internationally for leading France's strong opposition to the US-led invasion of Iraq in 2003.

The US wants Iran's 'exploratory violence' to be discussed at this week's UN General Assembly.

Both American and Saudi officials blame Iran for an attack on oil facilities in Saudi Arabia.

And despite Donald Trump's attempt to rally the support of other countries, he plays down chances of a military strike.

Professor Amin Saikal, middle-east specialist at the ANU and author of Iran rising, the survival and future of the Islamic Republic.

Danielle Pletka, American Enterprise Institute in Washington.

Also

Until the 'brown face' incident, Justin Trudeau was the darling of Canada. As they head towards an election, can the PM hold the throne?

Conrad Black, former media proprietor, whose publications included The Telegraph and The Spectator.

The US wants Iran's 'exploratory violence' to be discussed at this week's UN General Assembly.

Both American and Saudi officials blame Iran for an attack on oil facilities in Saudi Arabia.

And despite Donald Trump's attempt to rally the support of other countries, he plays down chances of a military strike.

Professor Amin Saikal, middle-east specialist at the ANU and author of Iran rising, the survival and future of the Islamic Republic.

Danielle Pletka, American Enterprise Institute in Washington.

Also

Until the 'brown face' incident, Justin Trudeau was the darling of Canada. As they head towards an election, can the PM hold the throne?

Conrad Black, former media proprietor, whose publications included The Telegraph and The Spectator.

The PM is invited to a rare state dinner at the Whitehouse. And although the relationship between Morrison and Trump is warm, could it be over before the main course arrives if they clash over China's increased assertiveness?

Paul Dibb, emeritus professor of strategic studies at the Australian National University's College of Asia and the Pacific.

Also

When it comes to philanthropy, Americans are the world beaters. Karl Zinsmeister says that when it comes to private giving and voluntary action, we can all learn something from the citizens of the US.

Karl Zinsmeister, executive at the Philanthropy Roundtable in Washington.

The PM is invited to a rare state dinner at the Whitehouse. And although the relationship between Morrison and Trump is warm, could it be over before the main course arrives if they clash over China's increased assertiveness?

Paul Dibb, emeritus professor of strategic studies at the Australian National University's College of Asia and the Pacific.

Also

When it comes to philanthropy, Americans are the world beaters. Karl Zinsmeister says that when it comes to private giving and voluntary action, we can all learn something from the citizens of the US.

Karl Zinsmeister, executive at the Philanthropy Roundtable in Washington.

Boris Johnson has one job: to make Brexit happen.

But three years after the vote to depart the EU, the British parliament sits stagnant. No divorce deal. No general election.

And with the prime minister describing the October 31 deadline as 'do or die', is there a chance it won't happen at all?

Simon Heffer, British commentator, historian and author of Staring at God- Britain 1914-1919.

Also

Robert Mugabe is dead. But while the world saw the 40 year leader of Zimbabwe as a despotic monster, there were a tiny few who saw him in a more generous light.

David Coltart, Zimbabwe human rights lawyer, former cabinet minister and author of The Struggle Continues: 50 years of tyranny in Zimbabwe.

Boris Johnson has one job: to make Brexit happen.

But three years after the vote to depart the EU, the British parliament sits stagnant. No divorce deal. No general election.

And with the prime minister describing the October 31 deadline as 'do or die', is there a chance it won't happen at all?

Simon Heffer, British commentator, historian and author of Staring at God- Britain 1914-1919.

Also

Robert Mugabe is dead. But while the world saw the 40 year leader of Zimbabwe as a despotic monster, there were a tiny few who saw him in a more generous light.

David Coltart, Zimbabwe human rights lawyer, former cabinet minister and author of The Struggle Continues: 50 years of tyranny in Zimbabwe.

The Islamic world has a blind spot when it comes to China's treatment of the Muslim community.

Beijing's brutality of the ethnic Uighurs in the north-west province of Xinjiang continues to anger countries around the world.

Should Australia step-up its opposition to Xi Jinping's regime and risk losing our most important trade relationship?

Daniel Pipes, president of the Middle East Forum in Philadelphia, USA.

The Islamic world has a blind spot when it comes to China's treatment of the Muslim community.

Beijing's brutality of the ethnic Uighurs in the north-west province of Xinjiang continues to anger countries around the world.

Should Australia step-up its opposition to Xi Jinping's regime and risk losing our most important trade relationship?

Daniel Pipes, president of the Middle East Forum in Philadelphia, USA.

We are running out of energy so why not consider the nuclear option?

Whether it is an act of war, the result of a natural disaster, a side-effect of testing or a total accident, nuclear energy and waste have resulted in too many catastrophes. Now it is being considered in parliament as an alternative solution to dwindling energy. Is it possible to forget the past in order to embrace the future?

Adam Bandt, deputy leader of the Australian Greens Party and David Limbrick, Liberal Democratic Party member of the Victorian Legislative Council.

Also

This weekend marks the 20th anniversary of the East Timor vote for independence. These were heady days for Australian diplomacy led by the Howard government as troops were sent to East Timor. Our longest-serving foreign minister was there.

Alexander Downer, former Australian foreign minister from early 1996 to late 2007, and executive chairman of the International School of Government at the Kings College in London and chairman of Policy Exchange, a prominent British think tank.