Republicans want to out the whistleblower because they can’t defend Trump on the merits

https://www.vox.com/2019/11/5/20949637/rand-paul-trump-rally-lexington-kentucky-whistleblower
"The whistleblower complaint that initially sounded the alarm about President Donald Trump’s dealings with Ukraine is no longer key to public understanding of the scandal, and for a straightforward reason: Sworn testimony and evidence released by the White House have already established that his central allegations are true."