Realistically, no. As much frustration as there might be on both sides, no alternative or 3rd party candidates have enough support or popularity to win. The only way a 3rd party will eventually have a chance is to work its way from the bottom up, starting with city councils and school boards and progressing from there.
John McCain was a US Senator before becoming a candidate for the United States Presidential elections in 2009.
Before becoming dorm mates with former presidential candidate and vice president Al Gore, he was born and raised in a small town in Texas.
Barack Obama served as US Senator from Illinois prior to becoming a candidate in the 2008 Presidential election.
Andrew Johnson of Tennessee. He had his reward by becoming the Vice Presidential candidate on the ticket with Lincoln in 1864, replacing Hannibal Hamlin, who was Vice President during Lincoln's first term. Johnson became President when Lincoln was murdered.
Typically in the past several decades, the first step in becoming a U.S. presidential candidate is the formation of an exploratory committee to determine the feasibility of running for president.
Fillmore only became president because of the unexpected death of President Zachary Taylor. I doubt very much that he had any expectation or any real hopes to becoming President. He did not receive any votes for president at the nominating convention. In those days, VP was mostly ceremonial position and had no influence. It was not a position that an aspiring Presidential candidate would want.
The Twelfth Amendment to the United States Constitution, specifically Section 3, is what prohibited Al Gore from becoming Vice President in the 2000 Presidential Election. This section states that if no candidate receives a majority of electoral votes, the House of Representatives chooses the President from the top three candidates. Even though Gore finished second in electoral votes, he did not receive a majority, so the decision fell to the House of Representatives, which ultimately chose George W. Bush as President.
A candidate must be a natural-born U.S. citizen.
Trump was invited by Mexican President Enrique Peña Nieto to improve relations with the American candidate, in case he won the 2016 Presidential Elections. This however, backfired spectacularly for the Mexican president: after the visit, Trump was now seen as a serious presidential contender, while he never changed his extreme views about Mexico and Mexican people, because like the rest of his "base", Trump sees Mexico as an enemy. This added confidence points to the Republican candidate, who eventually won the presidency during the November 2016 elections. For the Mexican President, this fiasco resulted in a huge amount of criticism by his detractors, becoming one the most unpopular presidents in recent Mexican history, to the point that during the Mexican 2018 Presidential Elections, there is a high probability that a socialist, populist candidate -- the Mexican version of Bernie Sanders -- wins the incoming elections.
The more common way of becoming the U.S. President is winning a U.S. Presidential Election. That is done by receiving votes for president from more than half of the 538 people appointed by the states to elect the President and the Vice President. The other way of becoming U.S. President is by being the U.S. Vice President at the time that a President dies, resigns, or is removed from office.
No. Former vice presidents are referred to with the highes honorific they had achieved prior to becoming vice president. Example - a Vice President that was a Senator before becoming Vice President would be referred to as Mr. Senator after he left the Vice Presidential office.
Following the assassination of President McKinley in September 1901, Roosevelt, at age 42, succeeded to the office, becoming the youngest United States President in history.