Environmental Tectonics Corp. and W. S.

Kirkpatrick & Co. were both competing for a valuable contract with the Nigerian government.

Kirkpatrick got it. Tectonics then sued Kirkpatrick in the United States, claiming that Kirkpatrick got the contract only because it bribed Nigerian officials. Kirkpatrick acknowledged that the district court had jurisdiction but argued that it should abstain from hearing the case. What doctrine does Kirkpatrick rely on, and what should the trial court do?