Actual FDR did want to join in the fight, primary sources and public events support FDR's intentions enough that it is not speculation. What held the United States out of the fight for so long were the isolationist proportion of Congress and powerful interest group supporters like Henry Ford. Congress had passed three separate Neutrality Acts starting in 1935, as of 1939 FRD began to openly press for modification of the Neutrality Act as indicated on Sept. 21st 1939 during a special session of Congress.Verlander said:I can imagine the last thing FDR wanted to do was join into the war. It held little possibility of re-election, and you hadn't exactly prospered since the last world war. Then the over enthusiastic Japanese take out Pearl Harbour, one of the stupidest moves in the war, and in Japanese history. FDR declares war on Japan. Hitler (making another stupid move) declares war on the USA just 4 days later, thinking that the Japanese have a chance of bringing the US down. That way he can move in and take the rest after the European conquest is complete.
There is no way of telling whether FDR would have joined in the European struggle otherwise. I'd say no, but again it's down to speculation. Tell me, if you were the leader of an economically fragile country, who had been attacked by one powerful empire, would you simultaneously pick a fight with the Nazi machine which has almost desecrated Europe?
In support, we're lucky to have a public release of radio broadcast on the Special Session via this link, care of the University of Virginia:
http://xroads.virginia.edu/~1930s2/radio/day/radio.html
The broadcast is from 1:45- 3:00 PM and the actual speech begins on the second recording. It should be noted that FDR even though President of the United States of America, like all presidents to come, was responsible to Congress (the national purse string holders) and in the end to the general citizens of the US; with that said, FDR's language still had to be carefully chosen.
To answer the question begged, on why FDR would want to enter the war. This can be seen on three points, morales, pragmaticism, and economical. Towards FDR's moralities, the easiest and biggest indicator would be FDR's push for the United Nations. Like Wilson and the League of Nations, FDR also believe in global responsibility along with shared security and it's fact that both men shared similar ideals (Wilson personally appointed FDR as Assistant Sec of the Navy, 1913.)
Towards pragmatism, FDR saw Hitler and the NSDAP as a threat to global security. In support, as early as 1937 of course before even the invasion of Poland in 1938, FDR would over-rule the Joint Chiefs of Staff often on strategic direction (More than even Churchill) and press for joint combat exercises to test the services' abilities against possible German scenarios. Cited from: Records of the Joint Board 1903- 1947, National Archives Microfilm Publications M-1421, JB 350, Serial 608.
Finally we have economics, FDR and his cabinet (Which included Harold Ickes, of the PAW fame) believed in a hands-on government that took charge and held itself responsible for national economics and direction on a base-line that transcended beyond simple profit. This portion can analysis to incredible depths and exceed more than a casual post. Anyways, FDR and Ickes opposed sales of national fuel resources to Germany as well as using economic pressure as a weapon of influence, as supported by FDR's Oct. 5th 1937, Quarantine Speech.
In the end, pulling all of that together you get a pretty sound picture that FDR was pro-intervention, but had to content with an isolation-merchant minded Congress and interest groups. Luckily for FDR, Japan -had- to attack the British and Americans to fullfill their desires to control the Far East and aquire the Central Pacific oil regions.
@Dancingman - I apologise if any of my posts in this thread are somewhat enthusiastic in their outcomes, it is rare that I get use this portion of my formal education and I enjoy exercising it in a mature-ish discussional and non-argumentive forum.