How many sitting U.S. presidents were formally impeached?
3
2
2
2
2
2
2
2
2
1
2
1
2
1
2
1
2
1
2
1
3
2
1
3
2
1
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
2
1
4
3
1
4
3
1
4
3
1
4
3
1
4
3
5
1
4
3
5
1
0
4
3
5
1
4
0
3
5
4
3
0
5
4
3
5
0
4
3
5
4
0
7
3
5
4
6
7
3
0
5
4
6
7
5
0
4
6
7
5
4
0
6
7
5
6
7
0
5
6
7
5
6
7
5
No
6
7
5
No
6
7
5
No
8
6
7
9
5
No
8
6
7
9
5
No
8
6
7
9
5
No
8
6
7
9
No
8
10
11
6
7
9
No
2 of them
8
10
11
6
7
13
9
No
8
10
11
6
7
13
9
No
2 of them
8
10
11
6
7
13
9
No
8
10
11
2 of them
6
7
13
9
No
8
10
11
6
7
13
9