What was one legal issue that arose because if the Louisiana purchase agreement

One legal issue can be splitting the territory into slave and non-slave states. For example, Spain had abolished slavery of Native-Americans, however when the US took over, there was still slavery of Natives, so there were legal disputes on how it should be handled. Eventually the supreme court intervened to solve it.

both the house and senate must approve the conference report.   after it is approved by both on an identical from, it will be sent to the president.   if the president approves it, it will become law.