WATCH: Trump announces $54 billion South Korean investment in Alaska natural gas pipeline

The investment marks the second time this week that the Republican president has sought to highlight the promise of foreign investment made possible by his administration's trade policy in states where Republican Senate candidates are in tight election campaigns.

The investment marks the second time this week that the Republican president has sought to highlight the promise of foreign investment made possible by his administration's trade policy in states where Republican Senate candidates are in tight election campaigns.