Chelsea Clinton on Wednesday criticized Republicans for ratifying a party platform opposed to LGBT rights.

Gathering last week in Cleveland, Republicans approved a platform that calls for the undermining or reversal of the Supreme Court's 2015 ruling that led to nationwide marriage equality and supports so-called conversion therapy to minors and state laws that restrict transgender bathroom use.

“I think what I found most offensive really has to be, as a mom, the open embrace of conversion therapy in the Republican Party platform,” Chelsea told a group of LGBT activists gathered at the DNC in Philadelphia. “In other words, child abuse.”

Such therapies attempt to alter the sexual orientation or gender identity of gay, bisexual or transgender people and have been banned in several states, including New York, California and New Jersey.

Clinton's remarks came just two days after Democrats ratified the most LGBT-inclusive platform in the party's history.

(Related: Democrats ratify party's most LGBT-inclusive platform.)

Clinton called this year's election the most important in her lifetime.

“I will do everything I can between now and November to ensure that as many people I can reach know what’s really at stake in this election, and how my mom is fighting for, and how she has fought for, a better life in stark contrast to what Trump and Pence are proposing,” Clinton said. “And I hope that all of you will continue to be part of this effort.”