How many US vice presidents have gone on to become president?
9
2
2
2
2
2
2
3
2
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
1
5
0
3
2
4
1
5
3
2
0
4
1
5
3
2
4
1
0
5
3
2
4
1
5
7
0
3
2
4
1
5
7
3
2
0
4
1
5
7
3
2
4
1
0
6
5
7
3
2
4
8
1
6
5
7
0
3
4
8
1
6
5
7
3
0
4
13
8
1
6
5
7
3
4
13
8
1
0
6
5
7
3
11
4
13
9
8
1
6
5
7
3
11
4
13
9
8
1
6
5
7
3
11
4
13
9
8
1
6
5
7
11
12
4
13
9
8
1
6
5
7
11
12
13
9
8
10
6
5
7
11
12
13
9
8
10
6
5
7
11
12
13
9
8
10
6
5
7
11
12
13
9
8
10
6
5
7
11
12
13
9
8
10
6
7
11
12
13
9
8
10
6