"Now he's nothing more than a burnt out Uncle Tom sell out..."
Note an official rule of liberalism in general:
If a conservative says anything even remotely critical about President Obama, according to the left, whoever said it is automatically a despicable racist spewing "Dog whistle" slurs. In contrast, if a minority comes out as an outspoken conservative, liberals are free to shower him genuinely racist slur terms like "Uncle Tom" without ever being accused of racism for it, it's considered just "Speaking truth to power" or something like that.