Labor Day marks the traditional start of the sprint to Election Day.

President Donald Trump on Monday appeared to raise fresh questions about the Covid-19 vaccines that were first developed on his watch, saying his top public health agency is being “ripped apart” by debate over the success of the shots. While noting that he’s seen “great numbers and results” from some drug companies, Trump demanded they prove publicly that vaccines are effective in combating Covid and questioned whether unspecified data was being withheld from the public.