Ed Brayton from ScienceBlogs says “Not even close”:
1. Thou shall have no other Gods before me.
Blatantly unconstitutional. The free exercise clause of the first amendment guarantees that we each have the right to follow any God and any religious belief system we wish.
2. Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me.
Also unconstitutional on free exercise grounds. Americans can make any graven image they wish to make, and bow down to whatever god or idol they wish.
3. Thou shalt not take the name of the Lord thy God in vain
Unconstitutional on both freedom of religion and free speech grounds.
4. Remember the sabbath day, to keep it holy
Again, unconstitutional on free exercise grounds.