Pray Psalms 109:8 for Obama in these troubled times.

Indeed!

to catch big fish we need big bait
till all unveiled

That's an imprecatory prayer. Don't pray that unless you are strong in Christ. When you fire on evil it will fire back. If you are strong in Christ, then go for it!

You could also pray Pastor Peter's Pistol and Rifle Prayers.

PISTOL PRAYER
Lord Jesus we pray, With Thy Authority we say,
DC Sorcery cease, Satanic strongholds release,
Baals be broken and bound, With all idols be cast down,
Stop the spells, Send the spell-casters into Hell,
Jesus cause it to be, And thank You for the victory!

RIFLE PRAYER
“A Mighty Weapon”
Lord Jesus in Thy name we pray,
With authority granted us this day.
All Baals of Babylon be torn down
We raze their temples to the ground.
Lay low their sacred groves, tear down all their strongholds
Let Satan's Asherah cease. We dethrone, behead, defeat.
All ungodly powers, crushed beneath our feet
Their source of power, their symbols fall
At His words we speak by the King of all.
Their sorcery at our command will cease
Our Lord Jesus Christ has such decreed.
Victory in Jesus' name, the power of DC has waned
Satanic strongholds release, the Remnant we set you free
The servants of God we set you free.
Idols, sorcery, spells they cast, We break your hold,
we break your back Your symbols in the streets you've laid
Will be your tomb for thus we pray.
In Jesus' name we come, the Remnant shouts as one
Hear us our God we cry, let evil fail and die.
Let evil fail, let evil die.