【明報專訊】US president Donald Trump is faced with his biggest political crisis since he took office. Two of his former trusted aides have been convicted and may be subjected to heavy criminal punishment. The US midterm elections in November may be affected by the recent development, but opinion polls show that Trump's approval ratings are stable and hover around 40%. Judging from those state primaries already held by the Democratic and Republican parties, there is no sign that the Democrats will win a landslide victory in the congressional elections. What is obvious instead is the "Trumpification" of Republican candidates.