We are one year on from Donald Trump's shock 2016 victory in the US elections and calls for his impeachment have only grown louder.

It takes a majority vote in the House of Representatives to impeach a President and two-thirds of the Senate to convict him and remove him from office.

Republicans control both the House and the Senate - and are of course less likely to vote to impeach Trump - but the tide might be changing.

Trump might want to keep his eyes on the 2018 midterm elections.

If the elections this month - which have been promising for the Democrats - are anything to go by, Republican control of the House of Representatives could be in real danger in 2018.

If Republicans don't hold onto their majority in the House of Representatives next year, Mr Trump's Presidency could hang in the balance.