The article reveals the increasing international tension surrounding the presidency of Venezuelan President Maduro. Amidst political and economic turmoil, he has been allegedly "restrained" by the U.S. Most likely, the reference to "restraint" is suggestive of political measures taken such as sanctions or diplomatic isolation in response to the ongoing crisis.
Though geographically distant, the Japanese audience is highly interested in major international events and political conflicts. Japan, which values and recognizes democratic processes and political stability, might be concerned about the deteriorating political climate in Venezuela and its effects on the global scale.
In the US and EU, similar crises are met with a more active response. Sanctions, diplomatic pressure, and in some cases indirect or direct governmental intervention are among the common tools used to manage such geopolitical tensions.