To cancel plans to travel to Europe next week in case oil issues mean I can't get home

[Czerwonitz]

The trip is fully refundable

OP I think you might be overthinking by a lot here. You should still go & make the most of your holiday.

sounds better than losing out on the money you have paid for it

If Trump finally gets impeached, things might look different in a few months (although I am worried about things being kicked into motion that completely get out of hand). It's interesting to see what's going on in special elections around the US (basically, there have been local elections around the country and at least 28 'red' Republican districts have flipped to Democrats). It's not looking good for the midterms for the GOP.

Chester is beautiful- have you walked by the river and explored the water meadows? Walked round the walls and the rows?

Also within easy reach of North Wales and all the beautiful countryside.