President Donald Trump faced battles across many fronts in 2018, ending the year politically weakened after his Republican Party lost control of the U.S. House of Representatives at midterm elections in November. He began the year much as he ended 2017. He faced internal strife in a White House gripped by chaos and drama, losing his staff secretary, Rob Porter, who was forced out when allegations surfaced of past domestic abuse. National security adviser H.R. McMaster was removed, and was replaced by hard-charging John Bolton. Aide Hope Hicks resigned after years of service to Trump. The year ended with Trump pushing out Attorney General Jeff Sessions and White House Chief of Staff John Kelly. REUTERS/Leah Millis SEARCH "TRUMP POY" FOR THIS STORY. SEARCH "REUTERS POY" FOR ALL BEST OF 2018 PACKAGES. TPX IMAGES OF THE DAY. Matching text: USA-TRUMP/POY