Former Vice President Mike Pence is launching a $3 million ad blitz in swing states to slam economic proposals from Democratic presidential nominee Kamala Harris — including her multitrillion-dollar tax hike. Advancing American Freedom, a nonprofit conservative advocacy group founded by Pence, will run the digital ads in Pennsylvania, Ohio and Montana. His group also will distribute a “messaging memo” to Republican candidates competing in those states suggesting lines of political attack. The ad campaign will highlight the economic successes of the 2017 Tax Cuts and Jobs Act signed into law by former President Donald Trump — and Harris’ plans...