I fully believe the United States is going to be judged before the rapture. I do believe in a pre-tribulation Rapture in a literal 7-year tribulation and literal 1,000 year reign of Christ but the United States does not deserve to be raptured. I understand no one does but too many people in the United States think we’re going to escape judgment because we’re americans. I say that it is because we’re Americans that we are going to get judged.
But the rapture AKA "great catching up" is like salvation - to all who believe in Christ (1 Thess. 4:15-17). Salvation is not given to nations but to individuals who receive Christ.
Christ Jesus came into the world to save sinners [not "nations"]. 1 Timothy 1:15.
[E]very one [not "nation"] who calls on the name of the Lord shall be saved. Romans 10:13
Similarly, the rapture is also for those who believe in Christ, not to nations. (1 Thess. 4:15-17)
As far as God judging America, God judged ALL the sins of the world on the cross of Christ (1 John 2:2). God is not looking to judge the world but reconcile the world to himself.
And all things are of God, who hath reconciled us to himself by Jesus Christ, and has given to us the ministry of reconciliation; to wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and has committed unto us the word of reconciliation. Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be reconciled to God [our message to the world].2 Cor. 5:18-20.