What is the burden of proving that a party invoking federal jurisdiction has jurisdiction?

This conclusion is also patently correct with respect to the jurisdictional prong because the party invoking federal jurisdiction has the burden of proving that jurisdiction exists. See CenterMark Properties Meriden Square , 30 F.3d at 301 ("[T]he party asserting jurisdiction bears the burden of proving that the case is properly in federal court ...."). Moreover, the allocation of the burden of proof on all of the remaining issues to the party opposing remand is consistent with the principles identified in Parmalat I . "Federal courts abstain out of deference to the paramount interests of another sovereign, and the concern is with principles of comity and federalism." Quackenbush v. Allstate Ins. Co. , 517 U.S. 706, 723, 116 S.Ct. 1712, 135 L.Ed.2d 1 (1996). Absent contrary evidence, a federal court must presume that a state court will operate efficiently and effectively in adjudicating the matters before it.