MTG does better than Nancy?
https://www.quiverquant.com/congresstrading/politician/Marjo...
https://www.quiverquant.com/congresstrading/politician/Nancy...
Sure doesn't look like it.
It looks like she buys and holds, unlikely nancy. And it looks like she bought some AMD which had great returns (oh how I wish I bought it) and held it.
Looks like a false claim to me.