|Metal shoehorn (Photo credit: Wikipedia)|
A "shoehorn" is a device, usually metal, but can also be made of hardwood, that helps you slip your foot into a relatively tight shoe. (see right). In this usage, we are talking about making unrelated facts, often a piece of news, fit your particular world view.
Here is an example. Say, you have a view that government is evil, in cahoots with "big biz". You run into this news that "government shuts down huge Ponzi scheme". Your reaction is likely to be "Government is just out to crush competition to big biz".
However, if you have a view that government is a force of good, and you run into the SAME news "government shuts down huge Ponzi scheme", then your reaction is likely "good job, now the victims can be compensated".
In other words, this is basically confirmation bias, except with current news.
However, shoehorning can get a bit drastic, and in a certain context, completely out of touch with reality.