yes
No
Yes. The Articles of Confederation do not mention slavery in any way. This absence does not mean slavery was forbidden; rather, since there was no express ban of slavery under the Articles, slavery was indeed permitted in the U.S. under these statutes. Similarly the original Constitution does not mention slavery. Rather, in Article I, section 2, clause c, slaves are indicated in the phrase "and excluding Indians not taxed, three-fifths of all other persons." while in Article I, section 9, clause a, Congress is forbidden to an the slave trade until 1808 at the earliest. Similarly article IV, section 2, clause c, established the first fugitive slave ordinance under the new Constitution.
The main compromise in the original US Constitution was about slavery, which was permitted in some states and prohibited in others.
Already owned slaves were permitted, otherwise no slaves allowed in the state of Texas.
Wisconsin is part of the Union, and slavery is prohibited under Federal Law and the US Constitution. It may also be prohibited under the Wisconsin Constitution as well.
Something that is not permitted by the constitution is unconstitutional and illegal.
The Constitution had no say in the writting about being pro slavery or not, because men had refused to sign it if it included on for or not for slavery. So it was left out of the Constitution, but it was added later when it was banned in the admendments.
The Confederate Constitution prohibited the international slave trade but permitted the domestic institution without restriction and forbade any Confederate state to abolish it.
southern states would not agree to a constitution that banned slavery
nessasary and proper
slavery and prohibition, respectively the 13th and 21st amendments
The Constitution when it was originally ratified did not outlaw Slavery. In 1863 the Emancipation Proclamation decreed that all slaves in rebel territory (confederate states) were free on January 1, 1863. The official removal of slavery though came from the 13th Amendment to the Constitution in 1865.