A bromide is a platitude that is especially banal, something like:
Let's leave no stone unturned.
Be as busy as a bee!
This is the only candidate that represents Family Values.
I am sure you'll give 110% in your effort!
We need to think outside the box. (from post that got lost)
War on Poverty.
War on Crime.
War on Drugs.
There was some collateral damage.