[Ans] Which President signed a law declaring “In God We Trust” to be the official U.S. motto?

Step 1 : Introduction to the question "Which President signed a law declaring “In God We Trust” to be the official U.S. motto?"

In 1956, two years after pushing to have the phrase “under God” inserted into the pledge of allegiance, President Dwight D. Eisenhower signed a law officially declaring “In God We Trust” to be the nation’s official motto. The law, P.L. 84-140, also mandated that the phrase be printed (in capital letters) on every domination of U.S. paper currency. The phrase had been placed on U.S. coins since the Civil War when, according to the historical association of the United States Treasury, religious sentiment reached a peak.

[Answer] Which President signed a law declaring “In God We Trust” to be the official U.S. motto?

Step 1 : Introduction to the question "Which President signed a law declaring “In God We Trust” to be the official U.S. motto?"

...In 1956, two years after pushing to have the phrase “under God” inserted into the pledge of allegiance, President Dwight D. Eisenhower signed a law officially declaring “In God We Trust” to be the nation’s official motto. The law, P.L. 84-140, also mandated that the phrase be printed (in capital letters) on every domination of U.S. paper currency. The phrase had been placed on U.S. coins since the Civil War when, according to the historical association of the United States Treasury, religious sentiment reached a peak.