Not quite.
17% = 17%, yes. For the rest, you're making the mistake of assuming that the people who voted for Le Pen would vote for Bush.
Although that certainly is a Leftist's fantasy, one look at Le Pen's National Front is enough to demonstrate how inappropriate the comparison is. We're talking about anti-capitalist, anti-American nationalist morons, folks who had champagne in front of their TV on 9/11 while their 'great leader' always praised himself on being a close friend of Saddam Hussein and boisterously opposed both Gulf wars.
His electorate is a bitch for France's grandeur and sees anything American - particularly a proactive America - as a threat.