"She is not ready or qualified to be the president of the United States. Your choice will sink our government and our country into a constitutional crisis that we can not face," Trump said at an event in Michigan.
The state of Michigan is traditionally favor Democrats, and until last week Clinton had a lead of about five percentage points in the polls.
Therefore, Trump decided to invest efforts in that state hoping to take advantage of the new controversy about the FBI investigation of electronic messages from former Secretary of State.
The announcement last Friday of the FBI's decision to investigate new emails that could be related to former Secretary of State dramatically altered the dynamics and the rhetoric of the last week of the campaign.