I'm not a fan of Donald Trump, but it is essential that both sides be fairly represented in search results. Whether you agree with a candidate's view or not, a two-party system encourages healthy debate and exposure to new ideas. Fair play by the media is essential to promoting a democratic political system.
While the Republican Primary may be over, and Donald Trump may have been given the nomination, that does not mean he is done campaigning. He still is running against Hillary Clinton and has not finished his campaign, which will not end until the Election Day in November of this year.
Of course Google is wrong to omit Trump from its search results! The media is on a campaign of its own to discredit and at the same time ignore Trump. Google should be presenting an unbiased outlook on the current election. By leaving Trump out, Google is essentially casting a vote.
It's not a big deal if Donald Trump does not appear in Google search results. His media exposure is now so far out of control that people will know who he is and that he's running for president without needing to look it up by conducting a search through Google.