I understand that all hypotheticals that are counterfactual use "Were" because of the subjunctive mood.

> 
> 1. If I were President, I would enact a great number of new policies.
>  (It's counterfactual because I am not president, right?)
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I'm not sure what to do if there is a good possibility of it happening; do I still use "were"?

> 
> 2. If I was/were going to the store tonight, I'd be sure to pick up milk.
>  (It's not nearly as impossible as the first example)
> 3. If he was/were at the mall with you guys, I didn't see him
>  (I'm not sure at all about ones like this)
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