The ans is - 2
Who is the only US president to have served two non-consecutive terms and is therefore counted as both the 22nd and 24th president?
Which US President was assassinated by Charles J. Guiteau in the Sixth Street Station of the Baltimore and Potomac Railroad in Washington, D.C.?
What was the US codename for President George H. W. Bush's 1989 invasion of Panama, to depose and seize the de facto Panamanian leader, general and dictator Manuel Noriega?
Who was the first US president to succeed to the Presidency upon the assassination of his predecessor and the first US President to be impeached?