It's here: Trump inauguration day. We talk to our foreign affairs correspondent Ruadhan Mac Cormaic about some of the issues this historic presidency presents:

• How Trump and those to whom he has granted power differ from all previous administrations
• The domestic political forces that will shape his presidency.
• His relationship with China and Russia.
• His "abrupt departures" from long-standing protocol in international relations.
• The Irish perspective - what does it mean for the Irish in America?

Tweet about the podcast: @hlinehan