He'll trip, fall and sign it. Or it will pop up under some obscure farming bill he signs.. he is getting good at that.
Don't blame the POTUS for this. It's our system. A bill could come up regarding issue "A" and when all is said and done the House and Senate will have added, taken away, modified, and otherwise bastardized the legislation to the point the bill no longer addresses issue "A".
The only way the whitehouse squatter wont sign it is if he's impeached or removed from office.