Trump's 'America first' speech alarms U.S. allies

Republican U.S. presidential candidate Donald Trump delivers a foreign policy speech at the Mayflower Hotel in Washington, United States, April 27, 2016. REUTERS/Jim Bourg

LONDON (Reuters) - Donald Trump's first major foreign policy address alarmed American allies, who view the Republican front runner's repeated invocation of an "America first" agenda as a threat to retreat from the world.

While most governments were careful not to comment publicly on a speech by a U.S. presidential candidate, Germany's foreign minister veered from that protocol to express concern at Trump's wording.