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Donald Trump

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Andrew Card was an adviser to President Ronald Reagan, President George H. W. Bush and President George W. Bush

Andrew Card was an adviser to President Ronald Reagan, President George H. W. Bush and President George W. Bush. As White House chief of staff on 9/11, Card told President George W. Bush that the World Trade Center had been attacked. The Bushes say they have no plans to endorse Republican presumptive nominee Donald Trump. Card, who is now president of Franklin Pierce University in New Hampshire, joins "CBS This Morning" to discuss what Trump would have to do to earn GOP establishment support.

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Speaker Paul Ryan (R-Wisconsin) said Thursday he is "not ready" to throw his support behind Donald Trump

Speaker Paul Ryan (R-Wisconsin) said Thursday he is "not ready" to throw his support behind Donald Trump. Ryan, who will serve as chairman of the Republican National Convention in July, says he wants Trump to unify "all wings of the Republican Party and the conservative movement" before he is ready to support him. CBS News senior political editor Steve Chaggaris joins Vladimir Duthiers to discuss.

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After Donald Trump's rivals dropped out, leaving him as the presumptive GOP nominee, the nomination fight continues on the Democratic side

After Donald Trump's rivals dropped out, leaving him as the presumptive GOP nominee, the nomination fight continues on the Democratic side. Bernie Sanders has vowed to stay in the race until the very end. What does the Vermont senator need to do to beat Hillary Clinton? CBS News congressional correspondent Nancy Cordes joins CBSN to discuss.

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Donald Trump has outlasted all of his Republican presidential rivals, but he is left with a sharply divided party

Donald Trump has outlasted all of his Republican presidential rivals, but he is left with a sharply divided party. CBS News contributor Bob Schieffer, former moderator of "Face the Nation" and former chief Washington correspondent, joins "CBS This Morning" from Washington to discuss the impact of the division on Donald Trump and what it will take for the GOP to unite.

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Less than 24 hours after Sen. Ted Cruz dropped out of the presidential race, Gov. John Kasich also announced he's suspending his campaign, making Donald Trump the GOP's presumptive nominee

Less than 24 hours after Sen. Ted Cruz dropped out of the presidential race, Gov. John Kasich also announced he's suspending his campaign, making Donald Trump the GOP's presumptive nominee. CBSN political contributor and Republican strategist Leslie Sanchez and Washington Post writer Philip Bump join CBSN with more on what's next in the race.

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Hillary Clinton has more than 90 percent of the delegates needed to clinch the Democratic nomination; and Bernie Sanders' win in Indiana did little to slow her momentum

Hillary Clinton has more than 90 percent of the delegates needed to clinch the Democratic nomination; and Bernie Sanders' win in Indiana did little to slow her momentum. But in an interview with "CBS Evening News" anchor Scott Pelley, Sanders gave his word that he will not drop out before the Democratic convention.

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