There was no U. S. presidential election in 1850.

That has always been false; there was not a U. S. Presidential election in 2002. The most recent U. S. Presidential election before 2012 was in 2008.

Maryland has controlled ten votes since 1964 and is staying at ten through 2020.

CNN Goes Beyond the 2008 U-S- Presidential Election Soundbites - 2007 TV was released on:

USA: 2007

No, they got the right when the 23rd Amendment to the U. S. Constitution was ratified (March 29, 1961). The first time was the election of 1964.