"Religious liberty" or "religious freedom" is often associated with church/state issues.

1.  What religious liberty/freedom is:

https://www.aclu.org/issues/religious-liberty

2.  What is the LDS take on religious liberty?

http://www.mormonnewsroom.org/official-statement/religious-freedom

3.  "Religious Freedom" from the Encyclopedia of Mormonism:

http://eom.byu.edu/index.php/Religious_Freedom

4.  Elder Dallin H Oaks on religious freedom, an address delivered to the Beckett Fund:

https://www.firstthings.com/web-exclusives/2016/03/a-mormon-perspective-on-religious-freedom

5.  Religious liberty and defense of marriage:

http://www.usccb.org/issues-and-action/marriage-and-family/marriage/promotion-and-defense-of-marriage/upload/Handout-Religious-liberty-FAQs-2.pdf

6.  Religious liberty in previous eras:

https://thinkprogress.org/when-religious-liberty-was-used-to-justify-racism-instead-of-homophobia-67bc973c4042#.hqptb7ra0

7.  Defending religious liberty:

http://www.becketfund.org/

8.  International Religious Liberty Association:

http://www.irla.org/

9.  Liberty: A Magazine of Religious Freedom

http://www.libertymagazine.org/

10.  First Liberty:  a website for a leading law firm defending religious freedom

https://firstliberty.org/about-us/

11.  Pew Research Center "Religion and Public Life" data and stories, from the Pew Charitable Trusts

http://www.pewforum.org/