Rich Lowry: The coming 2020 train wreck

President Donald Trump and former Vice President Joe Biden agree on one thing — the other side is trying to steal the election.Trump told a gathering of students in Phoenix that this “will be, in my opinion, the most corrupt election in the history of our country.”He amplified the point, a constant theme of his, in a tweet: "RIGGED 2020 ELECTION: MILLIONS OF MAIL-IN BALLOTS WILL BE PRINTED BY FOREIGN COUNTRIES, AND OTHERS. IT WILL BE THE SCANDAL OF OUR TIMES!"The president of t