How many states voted for both Barack Obama in 2008 and Mitt Romney in 2012?
2
5
3
2
4
5
3
2
4
5
3
2
4
5
3
2
0
4
5
3
2
0
4
5
1
3
2
4
5
0
1
3
2
4
5
1
3
2
0
4
5
1
3
2
6
0
4
5
1
3
2
6
4
5
0
1
3
2
6
4
5
1
3
2
0
7
6
4
5
1
3
2
7
6
0
4
5
8
1
3
2
7
6
4
5
8
1
3
2
7
6
4
5
8
1
3
2
7
6
4
5
8
1
3
2
7
6
4
5
8
9
1
11
3
2
10
7
6
4
5
8
9
1
11
3
2
10
7
12
6
4
5
8
9
1
11
3
2
10
7
13
12
6
4
8
9
1
11
10
7
128
13
12
6
8
9
1
11
10
7
13
12
6
128
8
9
1
11
10
7
2 states
13
12
6
8
9
1
128
11
10
7
13
12
6
8
9
1
11
10
7
128
13
12
6
4 states
5 states
8
9
16
11
10