The bishops are calling all Catholics to pray in a special way for religious liberty during this time, as well as fast and sacrifice. In the Diocese of Brooklyn, several events are scheduled and can be found at this link. In the Diocese of Rockville Centre activities can be found at this link.
Thomas Peters, at CatholicVote.com has links to various other sites for additional activities taking place during the Fortnight.
Here is the text of the prayer being distributed by the bishops' conference:
O God our Creator,from your provident hand we have received our rightto life, liberty, and the pursuit of happiness. Youhave called us as your people and given us the rightand the duty to worship you, the only true God, andyour Son, Jesus Christ.Through the power and working of your Holy Spirit,you call us to live out our faith in the midst of theworld, bringing the light and the saving truth of theGospel to every corner of society.We ask you to bless us in our vigilance for the gift ofreligious liberty. Give us the strength of mind andheart to readily defend our freedoms when they arethreatened; give us courage in making our voicesheard on behalf of the rights of your Church and thefreedom of conscience of all people of faith.Grant, we pray, O heavenly Father, a clear andunited voice to all your sons and daughters gatheredin your Church in this decisive hour in the historyof our nation, so that, with every trial withstoodand every danger overcome— for the sake of ourchildren, our grandchildren, and all who come afterus— this great land will always be “one nation, under God, indivisible, with liberty and justice for all.”We ask this through Christ our Lord.