I’m saddened so few people got my joke earlier on Twitter, so much so that I feel it necessary to explain it because it involves two excellent dramas that everyone needs to have watched in their lifetime.
First, Matt Santos was a character on the West Wing played by Jimmy Smits. Santos was a Democratic senator from Texas who ascended to the presidency on the show. Writers on the West Wing noted that Santos’ character was based on upstart Illinois senator and President-elect Barack Obama.
Jimmy Smits has a recurring role as Miguel Prado on the Showtime drama Dexter. He plays a District Attorney who has become quite fond of Dexter Morgan, a serial killer who only kills those who kill others. Next, Sarah Palin, running mate of John McCain, stated in the final weeks of the election that “[Obama] pals around with terrorists”.
Therefore, “Matt Santos pals around with serial killers” is funny.