The most prominent person in the North who believed that secession was unconstitutional was President Lincoln. He was in step with many other Northerners.As an aside, the Confederate constitution sought to clarify this issue for its own states. Confederate states were not legally allowed to secede form the Confederacy as a clause within their constitution forbid secession.
That you believe you can do anything that the constitution does not specifically forbid.
The original Constitution did forbid an official religion for the nation. However, everyone in the US has the right to religious freedom.
the practice of untouchability.
Yes and no. The original Constitution didn't expressly forbid it, but it was abolished by the 13th amendment to the U.S. Constitution.
coin money (make their own money)
passing ex post facto laws
As illegal and a violation of the US Constitution.
The oath of office and similar things? No, there is no such portion.
slavery, this amendment forbids any type of slavery.
the answer is 10 years
It means that states can do what they want to do, IF the Constitution doesn't forbid it.
It forbid slavery and reconized equal rights.
The Constitution provided no guidance on secession or readmission of states.
The U.S. Constitution only gives Congress the power to coin money and regulate its value.
No the President's veto power is part of the checks and balances on Congress.
No, they recommended changes in the constitution
The Constitution said that the states were joined forever.
The 1948 Constitution of India forbade the practice of untouchability. Although it is forbidden, it is still practiced widely in the populous nation.
I would guess it is to avoid the problem of divided loyalty.
No. Article one section 10 outlines prohibitions on the states, Amendment 14 prohibits states from violating individuals' rights. Nowhere is the right of secession precluded.