German phrase
Ich war schon dafür.
Meaning
I was already in favor of it
When to use it
It shows earlier support. Use it to explain that you supported a decision before it was made.
Example dialogue
Hast du dem Vorschlag zugestimmt?
Did you agree to the proposal?
Ich war schon dafür. Aber es gab kein Budget.
I was already in favor of it. But there was no budget.