There was a discussion of this. I think of the charge itself, attempted first degree murder, as the biggest doll in a set of nesting Russian dolls.
The charge of attempted first degree murder requires all the actions of attempted second degree murder, plus some evidence of planning or premeditation. So if the prosecution cannot prove the planning element, but all the elements of second degree attempted murder, including intent, are established, he could be convicted of the lesser, included cause he of attempted second degree murder. So attempted second degree murder is the next smaller doll nested inside the biggest doll. Likewise, assault with a deadly weapon would be another, smaller doll.
My understanding is that at the conclusion of the trial, the judge instructs the jury as to whether they can consider any of the included, lesser charges, in addition to the original charge. What’s less clear to me is who gets to propose to the judge what lesser charges are considered.
So while the original charge is attempted first degree murder, I think it is conceivable that the eventual verdict could be a lesser charge (one of the smaller, nested dolls) such as attempted second degree murder. In principle, it could be assault with a deadly weapon, but I think it is going to be easy for the prosecution to establish intent.