Plausible, yes.
Doable, almost certainly not.
If enough of her own backbenchers say no, then they're in the predicament they were in before.
Tories have offered support, but on the proviso that they toughen it.
Can't see that happening whatsoever, so that support probably wouldn't materialse.
The ministers know this.
A similar position to the last government, with plenty of their own mps not vested in a tough approach.
The cynic in me wonders if Starmer et al can see the writing is on the wall, and have essentially decided to move away from the loony left, and go back for their traditional "red-wall" voters.
Alternatively, as I said before when she made her first speech in the role, she is pitching her bit for a leadership bid.
Quite a clever move on her part either way, though if she fails to made any headway with these measures, it will be hard for her to gain traction in a leadership contest.
It should also be noted that these measures won't be retrospective, so they would only come into force once the bill has passed, and a date announced.
That would also see a flood of crossings before the cut off date.
In essence, doing nothing about all those currently here, and arriving soon.