How come Asians overwhelmingly vote Democrat

I am not American, I can't vote

Many live in pro-Democratic states such as New York, California, and Illinois, and are influenced by the pro-Democratic culture and atmosphere.  Issues such as immigration and equality are important to Asians, and the Democratic supports that better than the Republicans.

we have Liberal Party of Canada Parti libéral du Canada, Conservative Party of Canada, Bloc Québécois, New Democratic Party Nouveau Parti démocratique. 

@SonsOfOdin
For the most part yes, I do believe in giving citizenship to 11-12 million illegal aliens & extended families. Overall immigrants have shown to be a positive in American society. There's also the economic issue of how do we continue the growth of domestic spending if our population isn't growing. It looks like immigration has played an important role in population growth since the U.S. birthrate hasn't been so high. Lastly, although many immigrants and their children identify with their culture from their old country, they also identify as being American. American culture is also changing in a variety of ways including the incorporation of immigrant cultures.
I see a lot of Filipinos leaning Republican since so many are in the U.S. military or had parents or grandparents in the military, and the military and the people in it tend to be Republican. Some Filipinos like the less tax mantra of Republicans especially when Filipinos become economically successful and are at a higher income tax bracket. But Filipinos need to understand that many of the industries that they work in such as the military, home health care, board & care, and the health industry in general are a form of government program or supported by the government to ensure the health and wellness of all Americans, and the government needs funds usually gathered in the form of taxes. Medicare, Medicaid, and etc. are all government agencies. Imagine the healthcare system without it. Filipinos tend to look at their own end which is their work and the salary they make from it, but they don't see the bigger picture and how things connect, and specifically how the government plays a big role in supporting the health industry. Why do so many Filipinos migrate to places like the U.S., Canada, England, and etc. to work as nurses, because they have strong health care system which pays nurses well at least compared to the Philippines. I'm not expert on the health care system, but the health care system of the Philippines is not as strong or as advanced as the U.S., and can't afford to pay nurses as high, and in my opinion that's partly because the government hasn't supported it as much. I should end this by saying that the Philippine health care system and allowing people to benefit from it be it as patients or nurses (or any other employee) is getting better.