the next limo's shape would likely resemble the new XTS (below, left). But Cadillac hasn't always been the go-to car company for presidential whips. Of course, we can only speculate about what the ...

The XTS is based on the XTS Platinum Concept that debuted at the 2010 Detroit Auto Show and will go on sale spring of 2012. It replaces both the STS and DTS in Cadillac's lineup and is expected to ...