PARIS — Former French president Nicolas Sarkozy will be put behind bars on Tuesday, starting a five-year sentence for conspiring to raise campaign funds from Libya, in a stunning downfall for a leader once known for his swagger and taste for the global spotlight. Sarkozy, who was the conservative president of France between 2007 and 2012, will become the first former French leader to be jailed since Nazi collaborator Marshal Philippe Petain after World War...