Did President Buchanan did not force seceding states to return to the Union?

President James Buchanan did not take decisive action to force seceding states to return to the Union. He believed that the Constitution did not grant him the authority to use military force against the states that had seceded. Instead, he took a passive approach, arguing that secession was illegal but feeling constrained by the political and legal complexities of the situation. This inaction contributed to the growing tensions that ultimately led to the Civil War.