I have run into a small question that I would like to check. When referring to one person out of a group, would one use "is" or "are"? 

For example:

> 1. I know you are one of the members that **is** running things.

> 2. I know you are one of the members that **are** running things.

For singular "one" it should be "is", but for plural "members" it should be "are". I'm hitting a mental block here and I'm uncertain, so any clarification would be greatly appreciated.