Most Asians in the US vote Democrat actually.
I'd like to see your sources on that. I find that hard to believe. Many Asians that I know are conservative, and many are Republicans. Among Asians, I think more Chinese and Japanese are conservative than is the case for Filipino and others. And there are a lot of Chinese-Americans.
... Asian Americans voted Republican and were the only racial group more conservative than whites in the 1990s, according to surveys.
... Overall, Asian Americans as a whole tend to vote for Democrats, but this trend has been fairly recent. As recently as 2000 polling number had difficulty determining Asian American voter affiliation. With some polls indicating a tendency to vote Republican, while other polls indicated a trend to vote Democrat. Due to the smaller size of the groups population, in comparison to the population as a whole, it remains difficult to get an adequate sampling to forecast voter outcomes for Asian Americans.
I think the real answer is unknown.