At what point does MSDNC pull the plug on its all-Left format?

Ratings via TV Newser:

• Total Viewers

9:10-10:20pm10:20-10:30pmPrime (8-11p)9-11pm Fox News 5.741M 6.617M 5.244M 5.831M CNN 3.326M 2.675M 2.441M 3.051M MSNBC 2.410M 2.473M 1.928M 2.312M

• A25-54 demo

9:10-10:20pm10:20-10:30pmPrime (8-11p)9-11pm Fox News 1.843M 2.183M 1.608M 1.880M CNN 1.130M 875K 804K 1.024M MSNBC 758K 678K 560K 712K