From what I've heard from other sources and read in other articles, Democrats will only delay the nomination if they aren't given certain records they requested to review regarding some of their complaints against Bolton.
It even says something to that effect in the article you posted (which you just happened to leave out)
Quote:
Democrats contended the White House had stiff-armed the Senate over classified information on Bolton's tenure in his current job as the State Department's arms control chief, and demanded more information before the Senate can give Bolton an up-or-down vote.
Quote:
Sen. Joseph Biden, D-Del., said Democrats do not want to postpone an up-or-down vote indefinitely.
"We are willing to vote 10 minutes after we get back in session, if in fact they provide the information," Biden said.
The solution here is simple: give the Democrats the documents they requested, which they should have done in the first place. If there really isn't anything in those documents that's damaging to Bolton, there's no harm in turning them over.