In the House there are a bunch of Republicans who vote conservative at a lower rate than many Democrats.
The worst of the worst are Bob Dold (R-IL) who votes conservative only 13% of the time and there are about five Republicans who vote conservative 33% of the time, including Curbelo of Florida, Bost of Illinois, Lobiondo of New Jersey and Dent of Pennsylvania.
There are about 20 Republicans who were below a 50% conservative voting record in 2015.
I would definitely call ones like Dold “Reds.”