The raid is the second in a year by investigators trying to determine whether the FN used European Parliament funds to pay for 20 assistants presented as parliamentary aides while continuing to work for the party elsewhere.
Parallels, parallels, parallels...
Le Pen strikes me as a real piece of work, to put it mildly. That said, police raids on the offices of political parties...well, that pushing it a little too far. I hope they were operating on more than a hunch.
Beyond that, using the government to pay the salaries of political employees is --I suspect--rampant.
There is an obvious difference between Marine Le Pen and Francois Fillon. Francois Fillon started the campaign as Mr Morality who would clean up French politics. He was the French "drain the swamp" candidate. He also personally enriched his family. Usually, and this is what Le Pen is in trouble for, this type of corruption is done to help the party.
You siphon off a bit of public money to pay for a political strategist for your party. You deal with some property owner to find a nice flat in central Paris so that the main office isn't understaffed because everyone must commute. Everyone has done that. Alain Juppe, the candidate who is rumoured to step in for Francois Fillon should he fall, was convicted for this.
But because Fillon was Mr Morality, the ethical and clean Monsieur Impeccable, he's in real trouble, and his campaign is collapsing. Which won't happen to Marine Le Pen. That said, it's impossible for her to win this.