Politicians are there to take the rap.

因为会是政客背锅。

The word rap has meant blame for several hundred years. The expression to take the rap first was used about 100 years ago.

Rap这个词曾有几百年都被用来指“惩罚”的意思。短语“take the rap（背黑锅）”约在一百年前被首次使用。