Finger on the pulse...
 

The Daily Beast combed through former Treasury Secretary Henry
Paulson's official phone records and notes that during the final
months of the presidential campaign he spoke with both presidential
candidates quite a bit.

But "it was the candidate from the opposition party, Obama, who was
far more plugged-in, engaging in 26 direct calls with Paulson,
compared with 14 for McCain. (For comparison, Bush logged in 24 direct
calls, plus 27 conference calls or meetings). Paulson placed more than
twice as many individual outgoing calls to Obama (14) as to President
Bush (6)."

To be fair, phone records alone are not the perfect measure of
communication between the men but they're very interesting
nonetheless.