In English, you'd say to candidates that you'll vote for them. How would you say this in German? Something like:
Hey Stefano, go for it. You have my vote.
Another common alternative:
Meine Stimme hast du.
To make it short:
Meine Stimme ist Dir sicher.
Du hast meine Stimme.
Would be OK, but here are more ideas:
Literally it means:
"You can count on me" (no matter what, if that person proofed to be trustworthy in the past.)