#3 Álvaro Uribe

Unconditional support in the drug war. The Colombian president was a staunch pro-U.S. voice in a region where Bush had few friends. The affection was mutual. Bush authorized millions in military aid for Colombia’s war against drug cartels and leftist rebels and awarded Uribe the Presidential Medal of Freedom, citing his “immense personal courage and strength of character.”

These days, things aren’t quite so friendly. Obama campaigned on his opposition to a free-trade agreement with Colombia, citing human rights issues. There is also growing concern in the administration over Colombia’s methods in the war on drugs. An anonymous source told the Washington Post that at their meeting last week, Obama planned to question Uribe on a recent United Nations report that characterized extrajudicial killings by Colombian security forces as “cold-blooded, premeditated murder.”

Uribe has also lost the unique status he enjoyed under Bush, as Obama has made an active effort to improve relations with other Latin American leaders, including leftists. Both presidents say that progress continues to be made on the free-trade agreement and other issues, but the days when Colombia was the one reliable U.S. partner in South America are over.