If you do not pray any certain prayers, say “Help me or (help the USA) God!” or say at least “Thank-you God” .
Another way is through the Bible:
Psalm 91New Revised Standard Version Catholic Edition (NRSVCE)
Psalm 91
Assurance of God’s Protection
1 You who live in the shelter of the Most High,
who abide in the shadow of the Almighty,[a]
2 will say to the Lord, “My refuge and my fortress;
my God, in whom I trust.”
3 For he will deliver you from the snare of the fowler
and from the deadly pestilence;
4 he will cover you with his pinions,
and under his wings you will find refuge;
his faithfulness is a shield and buckler.
5 You will not fear the terror of the night,
or the arrow that flies by day,
6 or the pestilence that stalks in darkness,
or the destruction that wastes at noonday.
7 A thousand may fall at your side,
ten thousand at your right hand,
but it will not come near you.
8 You will only look with your eyes
and see the punishment of the wicked.
9 Because you have made the Lord your refuge,[b]
the Most High your dwelling place,
10 no evil shall befall you,
no scourge come near your tent.
11 For he will command his angels concerning you
to guard you in all your ways.
12 On their hands they will bear you up,
so that you will not dash your foot against a stone.
13 You will tread on the lion and the adder,
the young lion and the serpent you will trample under foot.
14 Those who love me, I will deliver;
I will protect those who know my name.
15 When they call to me, I will answer them;
I will be with them in trouble,
I will rescue them and honor them.
16 With long life I will satisfy them,
and show them my salvation.
I also offer this Psalm prayer not just for GOP frontrunner Donald J. Trump, but also for the USA during these very difficult times.
Have mercy on me, a sinner