won't do · unable to · (at the end of a rhetorical question) can that be?

Can't we work this out?

I'm a loser.

There will be setbacks and false starts. There are many who won't agree with every decision or policy I make as president. And we know the government can't solve every problem.

Perhaps he'll never become famous.

In this country, we rise or fall as one nation, as one people. Let's resist the temptation to fall back on the same partisanship and pettiness and immaturity that has poisoned our politics for so long.