This is about more than just dealing with Iran, although that’s the proximate subject.

The Pentagon has told a second aircraft carrier strike group to prepare to deploy to the Middle East as the US military readies for a potential attack on Iran, according to three US officials.
President Trump said Tuesday that he was weighing sending a second carrier to the Middle East to prepare for military action if negotiations with Iran failed. The order to deploy could be issued in a matter of hours, one of the officials said.

And

Trump said in a social-media post following the meeting that he preferred to make a deal with Iran.

That last could certainly lead to more harmonious outcomes than dealing sanction or kinetic outcomes, but the there is a more optimal way for achieving that harmony.

That better way is for President Donald Trump (R)—all Presidents in all dealings with enemy nations—to set a hard, nearby deadline for reaching agreement, upon which if no agreement is reached, kinetic options and/or hard sanctions would begin and on a large scale. Two things are important at this point, though: the deadline must be set to a timeframe that’s achievable and not used merely as an ultimatum, and if the deadline is reached with no agreement, the sanctions/kinetics must never be pinpricks but must immediately be large enough to force the outcome originally sought.

“Talks are making substantial progress” can certainly be an accurate claim, but they must never be an excuse to delay or to reset farther out in time the hard deadline for agreement.

The first time or two this is tested by an enemy nation should end in sanctions and kinetics, but after that, with the empirical evidence, other talks with other nations are much more likely to proceed apace and with no stalling by the other side, as is Iran’s diplomatic doctrine, which that nation is operating within today.