US Republican presidential candidate Donald Trump says a “constitutional crisis” might arise should his Democratic rival Hillary Clinton be elected.
"Her election would mire our government and our country in a constitutional crisis that we cannot afford," Trump told supporters in Grand Rapids, Michigan, on Monday.
The business mogul said "Hillary is likely to be under investigation for a very long time" over her email scandal, adding that the country “would have a criminal trial for a sitting president" if she becomes president.
Trump described the former secretary of state “unfit and unqualified to be the president of the United States.”
The renewed focus on Clinton's use of a private email server as secretary of state has thrown her campaign into a crisis.
The former first lady’s popularity has dwindled with a new poll showing that 59 percent of registered voters have an unfavorable view of her.
On Friday, just days ahead of the November 8 election, a letter by FBI Director James Comey to the Republican-controlled Congress paved the way for the revival of an investigation into the email scandal.
The bureau will examine about 650,000 emails recovered from a laptop belonging to Anthony Weiner, a former US congressman who was married to Clinton’s top aide, Huma Abedin.
Trump has taken advantage of the new revelation, further attacking Clinton and bringing her fitness for presidency into question.
On Monday, he praised Comey, who had refused to recommend any criminal charges against Clinton after an earlier phase of the investigation, saying, "he (Comey) brought back his reputation."
"Thank you Huma. Good job Huma. Thank you Anthony Weiner," Trump said.
Clinton, however, criticized Comey, saying that he made such an announcement without providing evidence of wrongdoing.
"Now, they apparently want to look at emails of one of my staffers. And by all means they should," she told a rally in Kent, Ohio on Monday. "And I am sure they will reach the same conclusion they did when they looked at my emails for the last year: there is no case here."