How many US presidents have been formally impeached by Congress?
3
2
2
2
2
2
2
2
2
2
2
2
3
4
2
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
5
4
2
1
3
5
4
1
3
5
4
1
3
5
4
1
3
5
4
1
3
5
7
4
0
1
3
5
7
4
6
1
0
3
5
7
4
6
1
3
5
0
7
4
6
1
3
5
7
4
6
1
3
5
7
4
6
1
3
5
7
4
6
1
5
7
6
1
5
7
6
5
8
7
6
5
8
7
9
6
11
5
8
7
10
9
6
13
11
5
8
7
10
9
6
13
11
5
8
7
10
9
6
13
11
5
8
7
10
9
6
13
11
8
7
10
9
6
13
11
8
7
10
9
6
13
11
8
7
10
9
6
13
11
8
7
10
9
12
6
13
11
8
7
10
9
12
6
13
11
8
10
9
12
6
13
213