I've got a few foreign policy suggestions.

Give Guantanamo back to Cuba.

Give the Panama Canal back to Panama.

Close American military bases in the Middle East and other Third World areas and bring those troops home.

Begin serious negotiations to (by progressive stages) reduce ALL country's nuclear arsenals and other WMDs, including the USA and Russia. Said reductions to be equally proportionate to each country's existing arsenal. That is, everybody starts by reducing what they have now by, say, 15%, and go gradually from there on a schedule.

Have a return to international law as follows: NO country is EVER allowed to attack another country first upon any excuse.    If they do, then they are automatically considered to be technically at war with the entire rest of the world, and treated accordingly. Such treatment would reasonably begin with trade sanctions, the freezing of that country's overseas assets, and diplomatic pressure, with a military response on the part of the rest of the world as the last possible resort....and it would not be necessary, providing the world stood strong on the previous measures...not even against such a large power as the USA.

Stop crippling the Third World by burdening them with gigantic loan payments that they cannot possibly ever repay. Forgive those past debts now, and start over with a clean slate.

Act to raise the wages of Third World people everywhere through improving their infrastructure and economy, so that OUR jobs are not continually exported out of America, and so that poverty-stricken Third Worlders are not driven to become economic refugees who flee their own lands and try to get into North America and Europe. Give them a better standard of living where they LIVE. If this was done, there would not be millions of Latin Americans and Asians trying to get into the USA (and Europe) all the time.

It is inequality and economic injustice that has destabilized the world, not terrorism. Terrorism is an aftereffect of the anger and despair caused by an irresponsible foreign policy, American military interventions, the support of client dictators in the Third World, and the maintenance of gross economic inequality in the world.