It was investigated. Eventually. Most seems to have taken place during the Obama administration, along with most of the investigation.
Not good, the WaPo comments are trying to smear Trump with it! I should not be surprised... but they are delusional.
NO. I worked on this in the past, while stationed in Singapore. This has been going on for a while, during the entire Bush admin. This is still the tip of the iceberg. Plenty more are going down.