Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: London (CNN) British Prime Minister David Cameron is to resign Wednesday, paving the way for Home Secretary Theresa May to take the reins. May was officially named Conservative Party leader and successor to Cameron "with immediate effect" Monday, said Graham Brady, chair of the 1922 Committee, a collection of Conservative members of Parliament key to electing the party leader. She will replace Cameron on Wednesday evening. In remarks shortly after her leadership was affirmed, May said her priorities will be to administer Britain's exit from the European Union, a move approved by voters last month, to unite the country and to create a "strong, new, positive vision for the future," not just for the privileged few, but for everyone.Theresa May officially named Conservative Party leaderMay's sole rival, Andrea Leadsom, pulled out of the race 
 Question:Leadsom's withdrawal from the race came in the face of pressure from a faction of lawmakers in the warring _.

Conservative Party