"The colonoscopy of the vetting is now occurring," said a Democratic official, referring to the Vice Presidential candidate selection process, and speaking on condition of anonymity (CNN, 26/06/2020). Presumably, he meant that the Joe Biden team was in the last stage of their search for a candidate. Insiders believe that four women (Sen. Kamala Harris, Sen. Elizabeth Warren, Rep. Val Demings, and Atlanta Mayor Keisha Lance Bottoms) remain in strong contention.
The purpose of a metaphor is to create an image to make the meaning more clear. I picture a colonoscopy. The candidates who didn’t make it to the shortlist must have been discarded as negative stool samples, and those remaining are the polyps deep in the bowel of the Democratic Party, to be probed, filmed, sliced and tested by the selection team. But what exactly are they looking for? A cancerous (or communist) cell?
Well might the Democratic official who created this image wish to remain anonymous! It may be the most inappropriate metaphor of the year. What a bummer!
For another inapt metaphor, see the Climate Action Lens.