The chamber voted 52-48 to begin debate on a multitrillion-dollar plan that would cut taxes, boost spending for immigration enforcement and the military, and raise the debt limit.

"When [President William McKinley], most famously, put tariffs on in 1890, they lost 50% of their seats in the next election,” Sen. Rand Paul, R-Ky., told reporters. “When Smoot and Hawley put on their tariff in the early 1930s, we lost the House and the Senate for 60 years. So they’re not only bad economically, they’re bad politically.”