1. reflect deeply on a subject

I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate

2. heat with sugar and spices to make a hot drink

mulled cider

Thanks to "Artha - The Open Thesaurus" I have a choice: Mull as meaning #1; or Mull as meaning #2.

I found this somewhere in a thread over at dKos:

http://bluenationreview.com/bernie-sanders-is-running-negative-campaign/

What crap. But coming from Peter Daou, what else would one expect.

Here’s the Cliff’s Notes:

“What are you going to believe, Hillary, or your lying eyes?” Bernie is suggesting that you to trust your lying eyes when it comes to Hillary.