One issue is to which President or Congress a particular year's deficit should be attributed. U.S. Congressional terms start on Jan. 1, Presidential terms later in January, and the fiscal year on Oct. 1, so none of them exactly match up.
These nephridia, which are called protonephridia, are branched tubules of ectodermal origin. They are closed at the internal ends by terminal cells, or solenocytes, and open to the exterior by means of excretory pores, or nephridiopores.
Order: ERYSIPHALES (Powdery Mildews) kingdom: Fungi, phylum: Ascomycota . Powdery Mildews (Erysiphales) are obligate parasites of flowering plants (Magnoliophytina). Over 850 species are currently recognised (Braun & Cook, 2012).