I am for defense only. Preemption assumes way too much about the other side, which includes knowledge that either we do not have or choose to ignore. For example, Saddam Hussein negotiated his surrender prior to the US-led invasion of Iraq. The surrender was submitted to the Bush administration. The Bush administration chose to ignore that and invaded anyway, with great loss of life and property.
In the Constitution, war is supposed to be declared by Congress. But various laws and authorizations by Congress are used by Presidents to take military action without declaring war, including offensive and anticipatory military action. This too must end.
And then too, we the people must be ever vigilant against charismatic populists who tell everybody what they want to hear even while they are destroying the Constitution they sworn to protect and defend.
I would promise to respond with overwhelming force when and where you least expect it.