I quote from Wikipedia
". In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. The cancer may also spread to more distant parts of the body through the lymphatic system or bloodstream."
Given the utter invasion of the Republican Party by a vociferous and rowdy group of Tea Party members, I would like to conclude that the Tea Party is a very malignant form of cancer that has afflicted the very body of the Republican party.
As the very same way the body is not able to repel the attack of the cancer growth, so has the Republican party not been able to control this virulent growth of utterly anti national movement ( as much as they can claim to be patriotic).
Unless and until the Republican party is able to give itself a large dose of Chemo and Radiation therapy, it is highly likely that this disease will consume the Republican party and leave it hollow.