On Sunday, United States president Barack Obama left America for his first visit to Vietnam. A U.S. presidential trip aimed at sealing a friendship of an old enemy country into a new partnership to help counter the growing assertiveness of China.

According to Aljazeera, after four decades of having a war against Vietnam, president Obama was expected to use his visit to deepen defense and economic allies in Vietnam's communist government.

U.S. president's deputy national security adviser - Ben Rhodes, said in a statement, "What we want to demonstrate with this visit is a significant upgrade in the relationship between the United States and Vietnam ... even as we have areas of difference."

NBC News reported that White House quickly made a point that the trip of president Obama will not make an apology. But instead, the trip will highlight Obama's continued pivot to Asia - specifically economic, trade and security cooperation.

It has been said that Vietnam and Japan are seeking points of burning down their doubts about a major twelve nation trade deal - TPP or the Trans-Pacific Partnership. But, Congress has yet to sign it for approval.

The Obama administration is meeting with lawmakers individually to sort out the issue. The bill remains in the halt in making progress, as the bill's future is not fully explained - even mainstream Republicans gave assistance to the trade package.

The U.S. Trade Representative - Ambassador Mike Froman, told reporters during a briefing on the forthcoming presidential  trip, "We're working to resolve a handful of key issues that have been flagged as particularly important by members of Congress."

As stated by CNN, while the 44th President of the United States is already in Hanoi and Ho Chi Minh City, Vietnam - the U.S. president will meet with Group of 7 leaders, that represents the world's largest economies.

And the officials of the White House claimed that terrorism will remain the center of interest of the G7.