England:  from the 1662 Book of Common Prayer

A Prayer for the Queen's Majesty.

O LORD, our heavenly Father, the high and mighty, King of kings, Lord of lords, the only Ruler of princes, who dost from thy throne behold all the dwellers upon earth; Most heartily we beseech thee with thy favour to behold our most gracious Sovereign Lady, Queen ELIZABETH; and so replenish her with the grace of thy Holy Spirit, that she may always incline to thy will, and walk in thy way. Endue her plenteously with heavenly gifts; grant her in health and wealth long to live; strengthen her that she may vanquish and overcome all her enemies; and finally, after this life, she may attain everlasting joy and felicity; through Jesus Christ our Lord. Amen.

A Prayer for the Royal Family.

ALMIGHTY God, the fountain of all goodness, we humbly beseech thee to bless Philip, Duke of Edinburgh, Charles, Prince of Wales, and all the Royal Family: Endue them with thy Holy Spirit; enrich them with thy heavenly grace; prosper them with all happiness; and bring them to thine everlasting kingdom; through Jesus Christ our Lord. Amen.

A Prayer for the Clergy and People.

ALMIGHTY and everlasting God, who alone workest great marvels; Send down upon our Bishops, and Curates, and all Congregations committed to their charge, the healthful Spirit of thy grace; and that they may truly please thee, pour upon them the continual dew of thy blessing. Grant this, O Lord, for the honour of our Advocate and Mediator, Jesus Christ. Amen.

America:  from the 1928  Book of Common Prayer

A Prayer for The President of the United States,
and all in Civil Authority.

O LORD, our heavenly Father, the high and mighty Ruler of the universe, who dost from thy throne behold all the dwellers upon earth; Most heartily we beseech thee, with thy favour to behold and bless thy servant THE PRESIDENT OF THE UNITED STATES, and all others in authority; and so replenish them with the grace of thy Holy Spirit, that they may always incline to thy will, and walk in thy way. Endue them plenteously with heavenly gifts; grant them in health and prosperity long to live; and finally, after this life, to attain everlasting joy and felicity; through Jesus Christ our Lord. Amen.

Or this.

O LORD our Governor, whose glory is in all the world; We commend this nation to thy merciful care, that being guided by thy Providence, we may dwell secure in thy peace. Grant to THE PRESIDENT OF THE UNITED STATES, and to all in authority, wisdom and strength to know and to do thy will. Fill them with the love of truth and righteousness; and make them ever mindful of their calling to serve this people in thy fear; through Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Ghost, one God, world without end. Amen.

A Prayer for the Clergy and People.

Almighty and everlasting God, from whom cometh every good and perfect gift; Send down upon our Bishops, and other Clergy, and upon the Congregations committed to their charge, the healthful Spirit of thy grace; and, that they may truly please thee, pour upon them the continual dew of thy blessing. Grant this, O Lord, for the honour of our Advocate and Mediator, Jesus Christ. Amen.