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