Key developments this week include a policy change for Pentagon officials and the continuation of the government shutdown.
The US will eliminate assistance to Colombia and enact tariffs on its exports, after President Donald Trump criticized Colombia's leader Gustavo Petro for not stopping drug production.
Trump referred to Petro as "an illegal drug leader" who is "low-rated and very unpopular."
Trump announced that Colombia has "no fight against the drugs" and is "a drug manufacturing machine" with "a lunatic" for a president.
The government shutdown continues as Washington scrambles to find a solution.
Author's summary: Trump imposes tariffs on Colombia and ceases aid.