France doesn't work like that
Olga...at the ultimate point, a French won't vote or will vote "blank"....but it's very very seldom that you will see a person from Left wing vote for a Right wing representant or a person from Right wing vote for a Left wing representant ...
There are some exceptions ,of course, as François Bayrou who was from Right Wing , then has definitely himself as a center person and now, even if he doesn't give officially directives to his members to vote, seems to indirectly push the things for that his members vote for Ségolène Royal ...with some little things as "Sarkozy is a Berlusconi...."...