If you are going to invoke scripture to settle the issue of whether prayer is acceptable at governmental functions, perhaps you should read the context of the scriptures. WWJD? 

When the crowds wanted Jesus to be involved in government, what did he do? John6:15. Also look at the line he drew at Matthew 22:18-21. 

Living by and exemplifying what he taught in our lives will make us better people, but that comes from the inside out.