A clear majority of the Supreme Court’s nine justices signaled Thursday that they would overturn a Colorado ruling barring former President Donald Trump from the state’s Republican presidential primary ballot. The former president, 77, and his lawyers were appealing the Dec. 19 decision by Colorado’s Supreme Court that found Trump ineligible for the March 5 GOP contest by virtue of violating the Constitution’s so-called “Insurrection Clause” during the Jan. 6, 2021, Capitol riot. Trump’s team argued separately that Congress — not the states — was tasked with enforcing the clause, that the provision did not apply to the office of...