Clear and Present Danger by Tom Clancy

The president, unsatisfied with the success of his "war on drugs," decides that he wants some immediate success. But after John Clark's covert strike team is deployed to Colombia for Operation Showboat, the drug lords strike back taking several civilian casualties. The chief executive's polls plummet. He orders Ritter to terminate their unofficial plan and leave no traces. Jack Ryan, who has just been named CIA deputy director of intelligence is enraged when he discovers that has been left out of the loop of Colombian operations. Several of America's most highly trained soldiers are stranded in an unfinished mission that, according to all records, never existed. Ryan decides to get the men out.