have a/(your) finger on the button

to be the person who controls the nuclear weapons (= weapons that use power made by dividing atoms) that a country has and decides whether to fire them.

If Europe has its own nuclear deterrent, whose finger would be on the button?

• give someone stick
• give someone the benefit of the doubt
• give someone the bird
• give someone the boot
• give someone the cold shoulder
• give someone the creeps
• give someone the elbow
• give someone the evil eye
• give someone the finger
• give someone the glad eye
• give someone the green light
• give someone the heave ho
• give someone the heebie-jeebies
• give someone their due
• give someone their head
• give someone their marching orders
• give someone their walking papers
• give someone the jitters
• give someone the kiss of life
• give someone the nod
• give someone the old heave ho
• give someone the once-over
• give someone the push
• give someone the right of first refusal
• give someone the right to first refusal