International Dateline issue

[CampbellHoffman]

I'm trying to display the international dateline on my map and it is not drawing properly. Any idea on how to fix this issue? 

[KoryKramer]

Where is the data from and what is its spatial reference?

And what is the coordinate system of the map?

I just added https://www.arcgis.com/home/item.html?id=68f844f9efd04df6a4636e0f410ac072 to a map in Pro and see the following:

Here is some information that may be helpful: https://desktop.arcgis.com/en/arcmap/latest/map/projections/what-happens-to-features-at-180-dateline...

Depending on the coordinate system of the map, you could try changing its parameters (right-click> Copy and Modify) https://pro.arcgis.com/en/pro-app/latest/help/mapping/properties/define-a-new-coordinate-system.htm#... to set the Central Meridian to 180 and see if that helps.