From their own website:
"PolitiFact.com is a project of the St. Petersburg Times to help you find the truth in Washington and the Obama presidency."
Now ... Politifact DID win a Pulitzer in 2009 for their so-called fact-checking during the 2008 campaign. On the other hand, most of this "fact-checking" that I remember seeing was nothing of the sort. It was scrutinizing anything Republicans said to find fault while trying to whitewash anything Hillary or Obama said.
In fact, the Pittsburgh Post-Gazette labeled the St. Petersburg Times as "usually liberal" in 2003.
So let's look further at this claim of 148 countries. Wikipedia (not my idea of a solid source but quick for the moment) lists the following (
http://en.wikipedia.org/wiki/List_of...bases#Overseas):
The US Army has facilities (not all facilities are bases but most civilians don't understand the different between a base, station, post, fort, camp, etc.) in Bulgaria, Iraq, Germany, Israel, Italy, Japan, Kuwait, Kosovo and South Korea. The USMC has facilities in Afghanistan, Germany and Japan. The US Navy has facilities in Bahrain, the British Indian Ocean Territory, Brazil, Cuba, Spain, Japan, Italy, Israel, Greece and South Korea. The US Air Force has facilities in Afghanistan, Bulgaria, Germany, Greenland, Italy, Japan, Qatar, Singapore, South Korea, Kyrgyzstan, Netherlands, Portugal, Spain, Turkey and the United Kingdom.
Wikipedia also lists Guam for the Navy and AF but Guam is technically US territory. So what's missing? The US Army also has a significant presence in the Marshall Islands (Reagan Test Site aka Kwajalein Atoll). The Navy used to have a small station in Singapore. Nothing was listed in Central America although we used to have camps there. There are frequently US military liaison officers located worldwide to either provide a contact for military partnerships (e.g., with allies like the Australians or French) and NATO bases are sometimes construed as "US" although there's technically no US real estate ownership as there is with official DoD bases. The various services have small detachments (anything from 2 people to 2-3 dozen) located all around the world to provide things like technical or logistic support and Marines are located at nearly every embassy to provide guards but these are hardly bases.
For some of the reasons above, I believe we have US military personnel stationed in 148 countries but to misquote Wendy's, "show me the bases."