France never had a right wing government since world war II and Macron thinks that right wing can't rule over the country anymore. For this reason only he dissolves French Assembly and now there will Re-election in two phases on June 30 and July 7.

The decision to stop Le penn is put under a big scanner. Le penn's right wing won elections by more than 30% vote share. That's huge. So, a re-election may not change a lot, IMO.

Now, about a 'Frexit', right wing will possibly not go this we ay but they will surely go against many policies made by EU such as immigration, foreign ties, environment strategy etc. etc.