may shield their citizens from federal laws that they deem unconstitutional. Jefferson advocated nullification, allowing states to invalidate federal laws altogether. He warned that, "unless arrested at the threshold", the Alien and Sedition Acts would "necessarily drive these states into revolution and blood". Historian Ron Chernow claims that "the theoretical damage of the Kentucky and Virginia Resolutions was deep and lasting, and was a recipe for disunion", contributing to the American Civil War as well as later events. Washington was so appalled by the resolutions that he told Patrick Henry that, if "systematically and pertinaciously pursued", the resolutions would "dissolve the union or produce coercion." Jefferson had always admired Washington's leadership skills but felt that his Federalist party was leading the country in the wrong direction. He decided not to attend Washington's funeral in 1799 because of acute differences with him while serving as secretary of state. Election of 1800 Jefferson contended for president once more against Adams in 1800. Adams's campaign was weakened by unpopular taxes and vicious Federalist infighting over his actions in the Quasi-War. Democratic-Republicans pointed to the Alien and Sedition Acts and accused the Federalists of being secret pro-Britain monarchists, while Federalists charged that Jefferson was a godless libertine beholden to the French. Historian Joyce Appleby said the election was "one of the most acrimonious in the annals of American history". The Democratic-Republicans ultimately won more electoral college votes, due in part to the electors that resulted from the addition of three-fifths of the South's slaves to the population calculation. Jefferson and his vice-presidential candidate Aaron Burr unexpectedly received an equal total. Because of the tie, the election was decided by the Federalist-dominated House of Representatives. Hamilton lobbied Federalist representatives on Jefferson's behalf, believing him a lesser political evil than Burr. On February 17, 1801, after thirty-six ballots, the House elected Jefferson president and Burr vice president. Jefferson became the second incumbent vice president to be elected president. The win was marked by Democratic-Republican celebrations throughout the country. Some of Jefferson's opponents argued that he owed his victory over Adams to the South's inflated number of electors, due to the counting slaves under the Three-Fifths Compromise. Others alleged that Jefferson secured James Asheton Bayard's tie-breaking electoral vote by guaranteeing the retention of various Federalist posts in the government. Jefferson disputed the allegation, and the historical record is inconclusive. The transition proceeded smoothly, marking a watershed in