巴西总统卢拉谈及美国关税问题：巴西一直愿意展开对话。

Group 1 - The core viewpoint of the article is that Brazil's President Lula expresses a willingness to engage in dialogue regarding the U.S. tariff issues [1] Group 2 - Brazil has consistently shown openness to discussions about trade and tariffs with the United States [1]