Menendez will not resign until he is carted off to prison (unless he has a visit by the men/ladies in gray suits who have decided he is a drag on their party). Christie will appoint the replacement, presumably a Republican.
“Christie will appoint the replacement, presumably a Republican.”
Only if Menendez resigns before next January 16th. You really think he’d do that? The NJ RATs will move heaven and earth to make sure Christie is gone before Menendez.