tough proposition

Mr. Kelly said it would be a “tough proposition” to get gun safety measures through the State Legislature.

But exploring this hypothesis in human experiments turns out to be a tough proposition because many of us are too contaminated to make good test subjects.

In the absence of direct regulation, the Biden administration’s options to tackle power industry emissions include pursuing legislation in Congress - a tough proposition given its partisan divisions - or regulating greenhouse gases indirectly as a co-benefit of other air pollutant or water rules - a step that could face stiff legal challenges.

But the constant Russian bombardment of the area as Russia tries to encircle Ukrainian forces there has made any large-scale evacuation an exceedingly tough proposition.

“You’re always going to have all that wooded forest land, and lakes, and there’s no wall or anything like that, and there’s no border patrol out there. There’s like one guy for 10,000 acres, there’s no roads or anything, that’s a really tough proposition,” Mr. Bensman said.