No, he is not.
Mitt Romney's great grandfather (his dad's mom's dad) was the son of Mormon Apostle Parley Pratt, who was a close friend of both Joseph Smith and Brigham Young. That is the closest association he has with them.
Joseph Smith and Brigham Young
Joseph Smith.
No. Brigham Young was in the eastern states.
Brigham Young's last words were "Joseph, Joseph, Joseph" presumably about the Prophet Joseph Smith, Jr.
Brigham Young actually didn't make many changes to the Church. Everything that Brigham Young did was in response to previous instruction given by Joseph Smith. For example, Brigham Young moved the Church to Utah because Joseph Smith prophesied in 1842 that the saints would find peace in the Rocky Mountains. Brigham Young expanded the practice of polygamy, but Joseph Smith had preached in favor of the practice as early as 1831 (polygamy officially began in 1843, still with Joseph Smith's approval). Brigham Young also expanded the practice of consecration (the 'United Order'), which Joseph Smith taught in 1834. (The practice is also found in the Bible and the Book of Mormon.) Brigham Young also expanded temple building (begun by Joseph Smith) and performed temple ordinances, which were given to him by Joseph in 1842.
Members of the Church of Jesus Christ of Latter-day Saints (the "Mormon" church) believe that Joseph Smith's successor was Brigham Young. However, many offshoot groups claim other successors, such as Joseph Smith's son, Joseph Smith III.
Brigham Young.
Joseph Smith was the founder, and he was in upstate New York at the time. Brigham Young took over after Smith's death.
In 1832 when Brigham Young converted to Mormonism and moved to Ohio.
No one killed Brigham Young. He died at the age of 76 after his liver ruptured. You may be confusing him with Joseph Smith. Brigham Young took over the presidency of the LDS Church after Joseph Smith was murdered. Joseph Smith was martyred by a mob (shot 4 times) while imprisoned in Liberty Jail, Missouri on unspecified charges.
If you're referring to The Church of Jesus Christ of Latter-day Saints, Brigham Young. If the Community of Christ, Joseph Smith III.
Brigham Young! He had way more children than Joseph Smith. Thus, Young had more Mormon descendants to further the Mormon movement . Brigham also didn't die as early as Joseph Smith, giving him more time to reign over "Zion"ANOTHER ANSWER:As there wouldn't be a Mormon movement without Joseph Smith, I'm going to say that he contributed more... he started the whole thing!