Vice President Mike Pence decided to weigh in on Venezuela and how democratic socialism is working down there. Since neo-cons still infest the white house, there is always talk of starting wars or expanding wars the government is currently engaged in. Not every problem worldwide is the United States' responsibility or can be solved by lobbing missiles at it.
Threatening a mentally unstable dictator with war isn't going to resolve Venezuela's economic and leadership problems, it will only exacerbate them.
http://www.reuters.com/article/us-usa-venezuela-pence-idUSKCN1AU1SN