The historical Christian interpretation is that all sexual sins are prohibited by the commandment against adultery.
In that context, heterosexual unfaithfulness is the natural predecessor to homosexual unfaithfulness. So our country needs to repent of the former while not ignoring the additonal threat posed by the latter.
Luke 11:45-52 One of the lawyers answered him, "Teacher, in saying this you insult us also." He said, "Woe to you lawyers also! For you load men with burdens that are difficult to carry, and you yourselves won't even lift one finger to help carry those burdens. Woe to you! For you build the tombs of the prophets, and your fathers killed them. So you testify and consent to the works of your fathers. For they killed them, and you build their tombs. Therefore also the wisdom of God said, 'I will send to them prophets and apostles; and some of them they will kill and persecute, that the blood of all the prophets, which was shed from the foundation of the world, may be required of this generation; from the blood of Abel to the blood of Zachariah, who perished between the altar and the sanctuary.' Yes, I tell you, it will be required of this generation. Woe to you lawyers! For you took away the key of knowledge. You didn't enter in yourselves, and those who were entering in, you hindered."