FDR was irresponsible wasn't he?

Clinton on Bush from Reuters:

"This was his decision to go to war, [...] we should expect him to extricate our country from this before he leaves office."

She justifies this by arguing that "he went with an ill-conceived plan, an incompetently executed strategy". This may be true but why exactly should wars, even if they are going badly, coincide with presidential terms? That would be a little convenient wouldn't it?