Or the Bra-strap as it is colloquially known...

The topic was global warming and the administration's attempt to conceal the information regarding it.
TB KNOWS that anthropogenic global warming is a fact, and that he will look like a fool arguing it... He also knows that arguing FOR the suppression of science will blow his cover as a supposed pro-science conservative intellectual and reveal him for the partisan hack he really is...
so instead he tries to change it to a discussion about how the liberal media (correctly) pointed out that there as a record high on a certain day and certain place, but nefariously failed to mention the temperature records on all the surrounding days.

This is his clumsy attempt to to reframe the topic. Changing it from the irrefutable science to an argument about the 'liberal main stream media'.

The Bra-strap is an impediment he creates to conceal the truth, to prevent you from getting to the subject at hand. Fruitlessly yanking on the bra-strap will only leave you frustrated and distract you from your ultimate goal.