I've met Tom Zimmer a few times.
He was a pilgrim when I met him, years ago. He compiled the original Pieta prayer book. He was at Garabandal when I was there, I later ran into him at San Damiano, then at Rome. I thought he was crazy - but holy. He wrote a journal and spiritual thoughts on every square inch of paper in minuscule printing, up the margins and on the back - sort of like crazy people do. He also followed many spurious apparitions, some he discredited, others he believed, but he seemed genuinely holy. He went to Mass several times a day, all over Rome and all over St. Peter's in the mornings. In retrospect, I wondered if he was like St. Benedict Joseph or a Russian Fool for Christ? His premonition about Donald Trump doesn't surprise me. He said many strange things - he also knew many saints - or persons who have since been beatified or canonized. In those days, I did too.
I was always such a skeptic though - I am still. One of my greatest faults I suppose. I have to pray more.
A fascinating story about Zimmer here.