10 most difficult pres­i­dents of the United States riddles

Martin Van Buren was the eighth president of the United States. 'Van' suggests Dutch origin of his surname, but the capitalized form indicates anglicised version - like Eddie Van Halen (as opposite to Dutch lower-case Vincent van Gogh).

These were Abraham Lincoln, James A. Garfield, William McKinley and John F. Kennedy. In addition to that, the death of Warren G. Harding is rumored to be an effect of poisoning.

Martin Luther King, American clergyman and civil rights leader, was fatally shot at the Lorraine Motel in Memphis, Tennessee, on April 4, 1968. President Lyndon B. Johnson made a personal call to King's wife, Coretta Scott King, and declared April 7 a national day of mourning, on which the U.S. flag would be flown at half-staff.

The estate is situated on the banks of the Potomac River in Fairfax County, Virginia. It was designated a National Historic Landmark in 1960 and is also listed on the National Register of Historic Places.

Marine One is the call sign of any United States Marine Corps aircraft carrying the President of the United States. It usually denotes a helicopter operated by the HMX-1 "Nighthawks" squadron, either the large VH-3D Sea King or the newer, smaller VH-60N "WhiteHawk".

This butterfly species has been descoverd in 2017 by Canadian Vazrick Nazari. He called it this way because of similarity to Trump's hairstyle.

Liberia was created in 1847 by freed slaves from the United States. They established a government modelled on that of the United States and named its capital city, Monrovia after James Monroe, a prominent supporter of the colonization.

Big stick ideology, refers to U.S. President Theodore Roosevelt’s foreign policy: "speak softly and carry a big stick, you will go far." Roosevelt described his style of foreign policy as "the exercise of intelligent forethought and of decisive action sufficiently far in advance of any likely crisis.The idea is negotiating peacefully but also having strength in case things go wrong. Simultaneously threatening with the "big stick", or the military, ties in heavily with the idea of Realpolitik, which implies a pursuit of political power that resembles Machiavellian ideals.

Reagan displayed a lot of humor. As a microphone test prior to his weekly radio address in August 1984, he said "My fellow Americans, I'm pleased to tell you today that I've signed legislation that will outlaw Russia forever. We begin bombing in five minutes."

These families are Bush (George H.W. and George W.) and Adams (John and John Quincy).