I have a vague recollection when I was very young - like 5- 6 yrs old - of my grandmother taking me to some event, I think in Round Top, TX where President Johnson was going to make an appearance. I recall being very near a big black car when he got out of the back seat and walked past us - maybe within 10' or less.
When I was in Jr High and living in Russellville, AR, I was at a ceremony in which the city was dedicating a new overpass and then Governor Clinton was there for the ribbon cutting ceremony and I was probably within 50' of him.
That's about it for me.
A wealthy American industrialist looking to open a silver mine in the mountains of Peru.