From the Yale Daily News:

They hesitate to label themselves “conservative” for another reason. On this campus, the term is loaded. At times, they feel uneasy talking about their conservative viewpoints among their friends.
“If you’re open about it, you’re going to be attacked,” one says, “but you want to have friends.”
“I bite my tongue a lot,” another adds.
The students asked to remain anonymous because they do not want their political views publicized.
Conservatives, without a doubt, form a much smaller community on this campus than they did a few decades ago. A recent News poll of 322 undergraduates found that while 67 percent of students describe themselves as liberal and 21 percent as moderate, only 12 percent of students call themselves conservative.
The conservative contingency in the faculty may be just as small, if not smaller. Professors said they could only name a handful of politically conservative colleagues.
“Among the faculty, there just isn’t any presence,” international studies lecturer Charles Hill said.