Jackie Evancho and transgender sister hope to 'enlighten' Donald Trump after reversal of transgender bathroom guidance

Evancho's sister, Juliet, is a transgender advocate who was born "Jacob."

"The reason why I did sing for the inauguration was not politics," Jackie Evancho, 16, said Thursday on "Good Morning America" in an interview alongside her sister, Juliet Evancho. "It was for the honor and privilege to perform for my country and that will stay the same I think."

"I guess I just want to enlighten him on what my sister, I’ve seen her go through every single day in school and people just like her, what they deal with," Jackie Evancho said. "The discrimination, it’s terrible."

The Trump administration letter claimed that the Obama-era directive caused confusion and lawsuits over its enforcement, and said that the states should take a "primary role" in establishing policy.

On Thursday, Juliet Evancho said she would also bring a message of understanding were she to meet with Trump.

"When I heard about it I was very disappointed and I realized that we would need to take action in order to enlighten the administration on everything," she said.

ABC News' Erin Dooley, Ignacio Torres, Hana Karar, Lauren Effron and Lesley Messer contributed to this report.