What principle is expressed by the latin phrase e pluribus unum? what does the phrase mean in english?

The phrase e pluribus unum expresses the principle of federalism. Each state and local government has its own power under a central government with limited powers. The phrase means “out of many, one.”

under god i have placed my chiest strentgh and the safe guard to my loyal subjects

four sitting presidents have been assassinated while in office but the first was abraham lincoln,