I would disagree that it's a scare tactic - scaring who? - Demint already has plenty of money. I think it's an experiment, quite unlikely to be successful, but possibly worth the money at this stage, to see if any headway can be made into making this a legitimate race. Every cycle has your races which are surprisingly close. And besides, the more states you can tell your donors that you're on the offense against, especially against politicians they detest -- the more money you can milk out of them for the DSCC.
And again, the more states that are on the offensive playing field, the more opportunities one has to have lightning strike, "focusing" probably isn't the best strategy at all.
I mean, it's a completely empty threat at this point.
I tend to agree with you on this. My basic though was Menendez is trying to get the limousine liberals to donate more dough and what better way then to entice them with the slim chance of removing the Numero Uno Conservative in the Senate.