How many presidents have also served on the Supreme Court?
1
2
2
3
2
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
3
2
4
5
3
2
1
4
5
3
2
1
4
5
3
2
1
4
5
3
2
1
4
5
3
2
7
1
4
5
3
2
7
1
4
5
3
2
7
1
4
5
0
3
2
7
1
4
5
3
6
2
0
7
1
4
5
3
6
2
7
1
4
0
5
3
6
2
7
1
4
5
3
6
8
7
1
4
5
3
6
8
9
7
1
4
5
6
8
9
7
1
4
5
6
8
9
7
1
11
13
5
6
8
9
7
1
11
13
5
6
8
9
7
1
11
13
5
6
8
9
7
1
11
13
5
6
8
9
7
1
11
13
5
6
8
9
7
1
11
13
10
6
8
9
7
11
13
10
6
8
9
7
11
13
12
10
6
8
9
7
11
13
12
10
6
8
9
7
11
13
12
10
6
8
9
11
13
12
10
8