In March 2013, Lopez joined Young Conservatives for the Freedom to Marry along with S.E. Cupp, Abby Huntsman, Elizabeth Huntsman, Mary Anne Huntsman, Meghan McCain and other conservative and Republican activists.
In June 2013, Lopez joined the group on a nationwide campaign to change the Republican Party's platform points on the issue; the campaign included visits to New Hampshire, Iowa, South Carolina, and Nevada. Lopez was identified as a leader in the movement. Following an announcement of Republican support among state senators in Rhode Island, Lopez stated: "Rhode Island Republicans are leading the way to a more inclusive GOP — one that can continue to grow and stay relevant as America changes. Their actions today show that not only do they know the freedom to marry is completely in line with conservative values like personal liberty and the importance of family, they are working to make it a reality."