Just speculating....
If T/V use the U-turn, I don't see them U-turning M/L. T/V would mostly like either choose J/C because of the taxi cab issue from the previous night, or more likely K/J since they know that they can not beat K/J in a foot race. Since TAR final legs sometimes have things involving speed of foot, it might be better for them to U-Turn K/J since T/V seem to be able to out footrace the other remaining teams. By U-turning K/J, they should be able to guarantee K/J's elimination. This would benefit them since they know bunching is generally planned for the final leg and they would be the fastest left for any land speed activities by foot. Not politics, just good strategy. I could see Victor U-turning K/J and saying "no more mr nice guy".
J/C would most likely U-Turn K/J. I don't see them U-turning M/L because of the alliance. I don't think they are going to beat T/V to the U-turn. But that leaves K/J to U-turn which J/C would feel they are doing M/L a favor.