user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'Results' regarding '1940 United States presidential election in Oklahoma'
Table Content:
| Party | Party | Candidate | Votes | % |
| --- | --- | --- | --- | --- |
| - | Democratic | Franklin D. Roosevelt (inc.) | 474,313 | 57.41% |
| - | Republican | Wendell Willkie | 348,872 | 42.23% |
| - | Prohibition | Roger Babson | 3,027 | 0.37% |
| Total votes | Total votes | Total votes | 826,212 | 100% |


Question
Who won Oklahoma in the 1940 presidential election and by how much?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Oklahoma was won by incumbent President Franklin D. Roosevelt, with 57.41% of the votes, against Wendell Willkie, with 42.23% of the votes."]