The least of Truman's problems was catering to the racist democrat base. Everybody in the democrat party catered to the racist base. Truman was selected by the DNC to be FDR's successor when the democrat party (typically) lied to the American public and their minions in the liberal media convinced America that the corpse they were running for his 4th term was a viable candidate. You almost gotta laugh that democrats got away with taking the current V.P. off the ticket while he was on vacation and running a timid little former clothing store owner as the logical successor to FDR when they knew FDR would die within a year and the timid little idiot they selected to fill his shoes would be a tool of the democrat party politics. FDR's medical records disappeared form a locked safe and Truman did what he was supposed to do. The problem was that Truman turned out to be an even smaller man than the fawning liberal media predicted. While the little man was trying to downsize the Military and do away with the Marine Corps, after all they sacrificed in WW2, wouldn't you know Korea came around. Truman didn't consult congress and sent Troops to Korea on an executive order and he screwed up the mission. We lost about 35,000 to 50,000 Troops in three years. but the liberal media who never saw a democrat they didn't like, created the legacy of the feisty little idiot. Truman couldn't get enough support from his own party to run for a second term after Korea and retired from politics.
Once again- a Conservative rationalization that basically is saying to African Americans that you think that they are stupid.