The Presidency of Theodore Roosevelt began on September 14, 1901, when Theodore Roosevelt became the 26th President of the United States upon the assassination and death of President William McKinley, and ended on March 4, 1909. Roosevelt had been the Vice President of the United States for only 194 days when he succeeded to the presidency. A Republican, he ran for and won by a landslide a four-year term as president in 1904. Building on McKinley's effective use of the press, Roosevelt made the White House the center of news every day, providing interviews and photo opportunities. Noticing the White House reporters huddled outside in the rain one day, he gave them their own room inside, effectively inventing the presidential press briefing. Those promoting progressivism also campaigned against corruption among political machines, labor unions, and trusts of new, large corporations, which emerged at the turn of the century. Upon taking office, Roosevelt proposed federal regulations of trusts.