In the preamble, what do the phrases "ensure domestic tranquility" and "secure the blessings of liberty to ourselves and our posterity" mean?

To "ensure domestic tranquility" in the Preamble means to guarantee peace domestically throughout the country.

To "secure the Blessings of Liberty to ourselves and out posterity" in the Preamble means to protect the country's hard-earned rights and freedoms.

The case was a u.s. supreme court decision that defined the scope of the u.s. congress's legislative power and how it relates to the powers of american state legislatures. the dispute in mcculloch involved the legality of the national bank and a tax that the state of maryland imposed on it.