Rush Limbaugh, the talk radio host who ripped into liberals and laid waste to political correctness with a merry brand of malice that made him one of the most powerful voices on the American right, influencing the rightward push of conservatism and the rise of Donald Trump, died Wednesday. He was 70.

Limbaugh said a year ago that he had lung cancer. His death was announced on his show by his wife, Kathryn.

Unflinchingly conservative, wildly partisan, bombastically self-promoting and larger than life, Limbaugh galvanized listeners for more than 30 years with his talent for vituperation and sarc...