By Lisa BaertleinLOS ANGELES (Reuters) -Five U.S. unions are calling on lawmakers to pass legislation that would help secure long-term funding to revive domestic shipbuilding, an effort championed by President Donald Trump and boosted by new port fees on Chinese ships. The bipartisan Shipbuilding and Harbor Infrastructure for Prosperity and Security (SHIPS) for America Act introduced in April would establish the Maritime Security Trust to reinvest the port fee proceeds into maritime security and infrastructure projects such as shipyard revitalization. Senators Todd Young, a Republican from Indiana, and Mark Kelly, a Democrat from Arizona, are among the sponsors of the SHIPS Act. That probe found China uses unfair policies and practices to dominate the maritime sector and cleared the way for the port fees poised to begin next month. The same union leaders who pushed for the USTR investigation called for lawmaker action on the SHIPS Act on Tuesday, Wessel said.