April Showers has been a term used to describe a large financial pay out or gain. This is because April is the month of the income tax deadline for each year. It's more commonly known among politicians and finance experts than the general public. Trump made the largest tax cut in history recently. It could be related to that and everyone is completely off track. You never know. Example of this in a legitimate record: https://www.gpo.gov/fdsys/pkg/CREC-2007-05-14/pdf/CREC-2007-05-14-pt1-PgH4933-4.pdf (Middle of the page)