U.S. President Donald Trump holds a bilateral meeting with German Chancellor Angela Merkel at White House., The meeting has been widely expected to be a difficult one. The two leaders hold talks in the Oval Office, hoping to narrow differences on issues such as NATO, Russia and global trade. Analysts expect Merkel to raise the issue of a proposed U.S. border tariff that would hit German manufacturers hard. Meanwhile, a White House official said that Trump wants to seek Merkel's views on Russia. Merkel has a decade's worth of experience interacting with the country. During his presidential campaign trail, Trump criticized Germany's trade surplus against the U.S.. He vowed to take measures to address it.