Where do you get your news from? You're claiming Obama had the FBI spy on Trump (ala Spygate), but this is a widely debunked conspiracy theory:
https://www.snopes.com/fact-check/obama-spying-trump-campaign/
https://www.politifact.com/factchec...-trump-repeats-false-claim-obama-spied-his-c/
https://www.nbcnews.com/politics/20...ntial-debate-trump-biden-n1241282/ncrd1241514
Regarding Biden's candidacy:
- Biden announced his 2020 presidential campaign on April 25th, 2019.
- Trump discussed the Bidens in a phone call with Zelensky on July 25, 2019 -- exactly 3 months later to the day.
Thus, Biden was a candidate. If you meant that Biden wasn't THE candidate as a nod toward Sanders, then you may want to check this out:
During the week leading up to the infamous phone call (Sept. 17-24), polling showed that Biden was Trump's strongest Democratic rival, with an aggregate polling average 8+ points higher than Trump:
https://en.wikipedia.org/wiki/Natio..._the_2020_United_States_presidential_election
This explains why Trump and his lawyer were so obsessed with Joe Biden in 2019. Biden was destroying him in head-to-head polls, and now that he's the Democratic nominee in 2020, is still destroying him by the same 8+ points just 4 weeks before the election.