Prime Minister Boris Johnson raised the prospect of a snap election after suffering a major parliamentary defeat on his first key Brexit vote.
Lawmakers - including 21 of Johnson's fellow Conservatives - voted 328 to 301 to seize control of the Brexit agenda.
This means they can bring forward a bill seeking to delay the UK's exit date.
In response, Johnson said he would seek action on that election bill Wednesday if he sees a second defeat.

UN 'deeply disturbed' by strike on Iran school that killed 160 children
Saudi confirms attempted attack on oil refinery, no damage
At least four killed in Israeli strike on building in Lebanon's Baalbek
Kuwait announces death of child from shrapnel wound
Philippine lawmakers advance impeachment of Vice President Duterte