Religion’s in the tug, too.

[sitifan]

The world is still in the back-wash of the war. The big boat’s gone by, but the suction behind at her stern is terrific. And we’re all having a time of it trying to sail across its rough wake. Whether it’s statescraft[sic], or what passes for statescraft[sic], or economics, or just plain bread and bed and coal, we’ve all got our hands full, clean to the fingertips, trying to keep afloat, and not to be sucked under, either financially or morally. For these seem the two deepest suctions in the wake of the boat. Religion’s in the tug, too; or rather, religious moorings. The real thing itself is safe enough. But our connections sometimes seem pretty shifty and uncertain.
https://bible.prayerrequest.com/9018-gordon-samuel-dickey-sd-quiet-talks-series-18-vols/11/642/

What does the expression "in the tug" mean?

 

[SoothingDave]

It's still talking about the "wake" or "suction." It's another force pulling/tugging/sucking.