Brexit envoy insists EU united as UK's May seeks concessions

Michel Barnier said that "the EU institutions remain united, and we stand by the agreement that we have negotiated with the UK, never against the UK" Barnier made his brief remarks after he met top European Parliament officials to discuss the Brexit votes in the British Parliament late Tuesday.

Britain is set to leave the EU in less than two months, but the main sticking point in London to sealing a Brexit agreement is the so-called "backstop."

It's aimed at ensuring that no time-consuming customs checks happen on the Irish border after Britain leaves, until a better arrangement is found.