Clinton isn't underestimating Trump though. She and other democratic groups have been running non-stop oppo research, focus groups, and is already reserving huge ad buys in the swing states that will force Trump into worse and more expensive time slots.
The rest of the Republican field decided to be cucks and wait until it was too late to hit back against Trump. She's going to hit him back twice as hard for every blow he throws at her.
This is the first time I've seen anyone on the Internet use the word "cuck" in a pro-Clinton context.
