Key 12 is really subjective. In my view, Obama is not as charsmatic as he was in 2008, but he is still charismatic.
Lichtman's methodology is really weird with the charisma keys. In his analysis, the following met the conditions of being "charismatic or national heroes":
Ulysses S. Grant, in 1868 and 1872
James G. Blaine, in 1884
William Jennings Bryan, in 1896 and 1900 (but not 1908)
Teddy Roosevelt, in 1904
FDR, in all four of his elections
Eisenhower, in 1952 and 1956
JFK, in 1960
Reagan, in 1980 and 1984
and that's it.
I thought he had given Obama the "challenger charisma" key in 2008, but I checked just now and he actually didn't. At any rate, if Obama didn't get that key in 2008 he certainly won't get it now.