The Liberty party beheld the proposed annexation of Texas with alarm, and sturdily opposed it as far as they could through their friends in Congress, predicting that it would be tantamount to a war with Mexico. The Mexican minister declared the same result. But "Texas or Disunion!" became the rallying cry of the South. The election of Polk, the annexationist Democrat, in 1844, was seized upon as a "popular mandate" for annexation, although had not the Liberty Party, who like the Whigs were anti-annexationists, divided the vote in New York State, Clay would have been elected. The matter was hurried through Congress; the Northern Democrats made no serious opposition, since they saw in this annexation a vast accession of territory around the Gulf of Mexico, of indefinite extent. Thus, Texas, on March 1, 1845, was offered annexation by a Joint Resolution of the Senate and House of Representatives, in the face of protests from the wisest men of the country, and in spite of certain hostilities with Mexico. On the following fourth of July Texas, accepting annexation, was admitted to the Union as a slave State, to the dismay of Channing, of Garrison, of Phillips, of Sumner, of Adams, and of the whole antislavery party, now aroused to the necessity of more united effort, in view of this great victory to the South; for it was provided that at any time, by the consent of its own citizens, Texas might be divided into four States, whenever its population should be large enough; its territory was four times as large as France. The Democratic President Polk took office in March, 1845; the Mexican War, beginning in May, 1846, was fought to a successful close in a year and five months, ending September, 1847; the fertile territory of Oregon, purchased from Spain, had been peaceably occupied by rapid immigration and by settlement of disputed boundaries with Great Britain; California--a Mexican province--had been secured to the American settlers of its lovely hills and valleys by the prompt daring of Capt. John C. Frémont; and the result of the war was the formal cession to the United States by Mexico of the territories of California and New Mexico, and recognition of the annexation and statehood of Texas.