I think the Melania speech “controversy” had its one day shelf life and is expired.
Michelle Obama gave a DNC speech in 2008. She was accused by bloggers of lifting lines for her DNC speech from Saul Alinsky.
One example: Alinsky wrote, in Rules for Radicals: “The standards of judgment must be rooted in the whys and wherefores of life as it is lived, the world as it is, not our wished-for fantasy of the world as it should be.” Michelle Obama said: “... about ‘the world as it is‘ and ‘the world as it should be.'”
Regardless, Obama was elected in 2008. Small potatoes, one day shelf life as you said.