Mr. Sanford’s brand of anti-spending conservatism has faded as a dominant strain in Republican politics in recent years, and it is entirely unclear whether the Tea Party-aligned activists who once thrilled to his platform might still find him a compelling figure.
The federal deficit has ballooned during the Trump presidency and will widen to $1 trillion for the 2020 fiscal year, according to the Congressional Budget Office. But Mr. Trump has been largely dismissive of deficit spending as a political issue, instead offering a message about national identity and racial and cultural grievances that the Republican base has heartily embraced.
As a member of Congress, Mr. Sanford amassed a solidly conservative voting record, including support for key Trump administration priorities like the 2017 tax-cut law. While the law increased the deficit, Mr. Sanford said he did not see it as a “gargantuan change to the revenue stream” and argued the law had made the American corporate tax rate more competitive with other countries.
But Mr. Sanford said he would be putting together a plan for reforming some of the most expensive and popular government programs, including entitlement programs like Social Security, and chided Mr. Trump for having dismissed government spending as a political issue.
“This is a president who said we’re not going to touch entitlements and, basically, we don’t have a problem,” Mr. Sanford said.
Mr. Sanford may have the opportunity to model fiscal austerity as a presidential candidate. Like Mr. Trump’s other challengers, he is likely to struggle to raise money, and on Sunday he outlined his thinking about the presidential race on board a bus from Washington to New York.
“It was $350 for a flight. Even the train was jacked up for some reason,” Mr. Sanford said. “It was, like, $30 for the Megabus.”