There are many ways to pray for those in authority. Here is a sample prayer that you could use as a starting point:
Dear God,
We lift up those in authority to you today. May they govern with wisdom, justice, and mercy. Give them strength and courage to do what is right, even when it is difficult. Protect them and their families from harm. Guide them in making decisions that will benefit the people they serve.
We pray that they would seek your will above all else and that they would be guided by your principles. Help them to lead with integrity and to be a positive influence on those around them.
We ask that you would bless those in authority and use them for your glory. In Jesus’ name, Amen.
Remember that you can always modify this prayer to better fit the specific needs and circumstances of those in authority.