his return. After returning from Cancún, Cruz volunteered in Houston to help with recovery efforts. 2016 presidential campaign As early as 2013, Cruz was widely expected to run for the presidency in 2016. On March 14, 2013, he gave the keynote speech at the annual Conservative Political Action Conference (CPAC) in Washington DC. He tied for 7th place in the 2013 CPAC straw poll on March 16, winning 4% of the votes cast. In October 2013, Cruz won the Values Voter Summit presidential straw poll with 42% of the vote. Cruz finished first in two presidential straw polls conducted in 2014 with 30.33% of the vote at the Republican Leadership Conference and 43% of the vote at the Republican Party of Texas state convention. Cruz did speaking events in mid-2013 across Iowa, New Hampshire, and South Carolina, all early primary states, leading to further speculation that he was laying the groundwork for a 2016 bid. Legal analyst Jeffrey Toobin described Cruz as the first potential presidential candidate to emphasize originalism as a major national issue. On April 12, 2014, Cruz spoke at the Freedom Summit, an event organized by Americans for Prosperity and Citizens United. The event was attended by several potential presidential candidates. In his speech, Cruz mentioned that Latinos, young people and single mothers are the people most affected by the recession, and that the Republican Party should make outreach efforts to these constituents. He also said that the words "growth and opportunity" should be tattooed on the hands of every Republican politician. Cruz delivered one of many State of the Union responses in January 2015. On March 23, 2015, Cruz started his 2016 presidential campaign for the Republican primaries and caucuses, in a morning speech delivered at Liberty University in Lynchburg, Virginia. Also, at the same hour, he posted on his Twitter page: "I'm running for President and I hope to earn your support!" He was the first major Republican presidential candidate for the 2016 campaign. During the primary campaign, his base of support was mainly among social conservatives, though he had crossover appeal to other factions within his party, including in particular libertarian conservatives. HarperCollins published Cruz's book A Time for Truth: Reigniting the Promise of America on June 30, 2015. The book reached the bestseller list of several organizations in its first week of release. Primary wins In the 2016 Republican presidential primaries, Cruz received