If Biden were the opposition, nobody could accuse Trump of being the loud-mouthed, foot-in-mouth, buffoon in the race. (Trump’s actually very smart, quick on his feet, and an effective communicator anyway.)
Trump would be a spring chicken compared to Biden, too.
You’re right about that. Biden makes Trump seem soft spoken, pensive, thoughtful, even cerebral. So maybe Trump’s running and Hillary’s falling poll numbers and legal troubles will bring Biden into the race. A Trump/Biden debate would sound a lot like a professional wrestling match. Still, I’m for Cruz.