President Joe Biden needs a cognitive test immediately, former white House physician Ronny Jackson tweeted Saturday.

The Texas Republican lawmaker made the comments after observing Biden’s televised town hall this past week, writing that “He’s completely LOST it” and that the president “needs a cognitive exam NOW!”

Jackson on Twitter also said, “Something’s SERIOUSLY wrong with Biden – and it’s only going to get WORSE! It’s past the point of embarrassment. He’s lost. He’s confused. He can barely put a coherent sentence together. He MUST have a cognitive exam and release the results!”