That puts Iran between Iraq and a hard place.
As a presidential candidate, Trump stated that I would grow weary of winning. He lied, as I have yet to tire of winning.
I had not really considered Iraq seriously complying with the sanctions. That would be a real blow to Iran.
The last time sanctions were on Iran, the Iraqi Government was led by a pro-Iran coalition, and Iraq was dependent on Iran for military support in a life-or-death struggle against ISIS. Mosul was the biggest urban battle since Stalingrad in WWII.
Sanctions were hardly considered in practice between their economies, and the rest of the world (including Obama) gave Iraq a free pass on enforcement. They were almost an open corridor for circumventing sanctions, including substantial oil smuggling out of Iraq, or through Iraq to Turkey.
After recent elections, a new coalition rules Iraq, that is in competition with Iranian supported factions for power domestically, and they no longer need Iranian help with security.
Their economies are strongly integrated - Iraq buys electricity from Iran’s grid, and Iran get’s a lot of their fuel from Iraqi refineries. One of Iran’s biggest problems recently has been truckers striking, and fuel issues have been a major concern.
If Iraq is on board (and President Trump is much less likely to tolerate cheating than Obama was), then the same sanctions will hit Iran harder this time.
And Iraq is further distanced from Iran, and that’s more winning by POTUS.
