Does anyone know why Trump said publicly today that both the Ukraine and China should investigate Biden?

Haven’t his supporters been protesting all along that he never, never suggested a foreign country investigate one of our politicians because that’s treasonous?

This article

“However, on Thursday he seemed to provide more insight into what he did in fact seek from Ukraine’s president….Trump said “I would think that if they were honest about it, they would start a major investigation into the Bidens,” Trump said. “It’s a very simple answer. They should investigate the Bidens. Because how does a company that’s newly formed and all these companies if you look—by the way, likewise, China should start an investigation into the Bidens. Because what happened in China is just about as bad as what happened with Ukraine.”

And also, why can’t he complete a thought?