Strikes need strike funds. Dem billionaire donors are not going to fund picket lines and unions (half of which majority voted for trump) are not going to sacrifice their livelihoods for what trump has done so far.

Mass protest is possible, but it won't come from organized labor unless something changes drastically.

Congresscritters could do a little more to gum up congress. Stop confirming his nominees except for the 3 sane options.

As others have said they will have a chance to negotiate when the shutdown comes due. We will see.