Former Vice President Mike Pence is expected to soon declare a long-shot campaign for the White House against the president under whom he served, pitching himself as a “classical conservative” who would return the Republican Party to its pre-Trump roots, according to people close to Mr. Pence. Mr. Pence is working to carve out space in the Republican primary field by appealing to evangelicals, adopting a hard-line position in support of a federal abortion ban, promoting free trade and pushing back against Republican efforts to police big business on ideological grounds. He faces significant challenges, trails far behind in the polls and has made no effort to channel the populist energies overtaking the Republican Party. In a sign his campaign will be announced in the coming weeks, a pro-Pence super PAC called Committed to America is being set up. A veteran Republican operative, Scott Reed, who ran Bob Dole’s 1996 presidential campaign and was the longtime top political strategist for the U.S. Chamber of Commerce, will lead the group alongside Jeb Hensarling, a close friend of Mr. Pence’s who served with him in Congress.

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