The UK Prime Minister is trying to save the Brexit deal with the European Union. The UK Brexit secretary quit because of the "final" deal that Ms May agreed with the EU. He said it was bad for the UK and the UK could not leave the EU. Ms May said her government must choose one of three things. She said: "We can choose to leave with no deal, we can risk no Brexit at all, or we can choose to unite and support the best deal."
Brexit means "British exit from the European Union". In 2016, Britain voted to leave the EU. They thought Britain would be stronger outside of the EU and could make trade agreements with other countries. People who voted to stay believe the UK is stronger in the EU. The UK plans to leave the EU in March, 2019. It is now unclear if this will happen. Many people believe Ms May's government will not agree to her new deal.