sharp as a tack

“President Trump is sharp as a tack,” Leavitt added, “and executes a rigorous campaign schedule every single day.”

“We all know at some point there’s the right exit off the highway to take, but when I talk baseball with him, he’s still as sharp as a tack.”

“Talk to him for five minutes and you’ll see he’s sharp as a tack.”

Whittle said Rutan had been courageous in his final hours at the hospital — sharp as a tack, calm and joking with them about what might come next after death.

He said his client’s ailments are physical, adding that mentally he is “sharp as a tack. Feet are firmly planted on the ground.”