align (oneself) with
To support, agree with, or form an alliance with a particular person or idea. As soon as I explained how the plan would benefit the company financially, the CFO aligned himself with the idea. Heather aligned herself with an animal rights group and began promoting veganism.
align oneself with someone or something
Fig. to bring oneself into agreement with someone or someone's ideas; to associate oneself with someone or someone's cause. She sought to align herself with the older members.
align something with something
to adjust, straighten, or arrange something in reference to something else. Try to align this piece with the one next to it.