Lobbying Congress was not part of Huang's job at Commerce, and Huang had contributed to Berman's 1994 campaign.
Huang didn't support Berman, which is why he refused to contribute to his 1994 campaign.
mnli hypothesis: Huang didn't support Berman, which is why he refused to contribute to his 1994 campaign. premise: Lobbying Congress was not part of Huang's job at Commerce, and Huang had contributed to Berman's 1994 campaign.