India, Jan. 24 -- President Donald Trump's centralized foreign policy decision-making has created sudden reversals and confusion among U.S. allies and his own administration, according to sources familiar with internal discussions. From a potential military threat over Greenland to secretive Ukraine peace talks, the approach has sidelined career experts and relied on a small circle of aides, risking lasting damage to key relationships.

Less than two weeks after normal diplomatic talks between U.S., Danish, and Greenlandic officials, Trump appointed a special envoy to the vast island. The envoy, Jeff Landry, posted on social media that he would help "make Greenland part of the U.S.," a statement that stunned Copenhagen and blindsided seni...