I'm stealing this prayer (and modifying it slightly) from here.
It's intended as a non-partisan Jewish prayer for voting. With a couple of tweaks, it's now both non-partisan and ecumenical.
With my vote today I am prepared and intending
to seek peace for this country, as it is written:
"Seek out the peace of the city where I cause you to roam
and pray for her sake to G-d, for in her peace you all will have peace." (Jer. 29:7)
May it be Your will that votes will be counted faithfully
and may You account my vote as if I had fulfilled this verse with
all my power.
May it be good in Your eyes to give a wise heart
to whomever we elect today
and may You raise for us a government whose rule is for good and blessing
to bring justice and peace to all the inhabitants of the world and
for rulership is Yours!
Just as I participated in elections today
so may I merit to do good deeds and repair the world with all my actions,
and with the act of...[fill in your pledge] which I pledge to do today
on behalf of all living beings and in remembrance of the covenant
of Noah's waters
to protect and to not destroy the earth and her plenitude.
May You give to all the peoples of this country, the strength and will
to pursue righteousness and to seek peace as unified force
in order to cause to flourish, throughout the world, good life and peace
and may You fulfill for us the verse:
"May the pleasure of our G-d be upon us,
and establish the work of our hands for us, may the work of our hands endure." (Ps. 90:17)