In a new book, John Bolton, President Trump's former national security adviser, claims the president asked China’s leader to help him win the reelection this fall. The book also says Mr. Trump explicitly tied aid to Ukraine to an investigation of the Bidens, the scandal that led to the president's impeachment. Ben Tracey reports. (Bolton's book is being published by Simon & Schuster, a division of ViacomCBS.)

Rep. Eric Swalwell, D-California, joins Margaret Brennan to discuss Attorney General William Barr's testimony and his 2020 presidential campaign.

Missed the second half of the show? The latest on the Mueller report investigation and presidential impeachment.

Bob Cusack, editor-in-chief of The Hill, joins "CBS This Morning: Saturday" to break down this week's trade talks between the U.S. and China, which ended with no deal, President Trump's decision to assert executive privilege over the full Mueller report and what could happen if Robert Mueller contradicts Attorney General William Barr's interpretation of that report.

Democratic Rep. Adam Schiff of California, the chairman of the House Intelligence Committee, joins moderator Margaret Brennan to discuss immigration, the increased threat from Iran and his views on impeachment.

Rank-and-file Democrats in Washington are intensifying demands for impeachment hearings. But the most powerful Democrat, House Speaker Nancy Pelosi, does not support them. She’ll meet with lawmakers after the latest snub from the White House. Nancy Cordes reports.

A huge blow-up between President Trump and Democratic leaders has done nothing to stop the rising call for impeachment hearings. Mr. Trump stormed out of a meeting with top Democrats at the White House Wednesday, three minutes after it started. Then he told reporters he won't work with Democrats until they stop investigating his administration. Major Garrett joins “CBS This Morning” to discuss why "the people's business is being neglected."

Sen. Ron Johnson, R-Wisconsin, joins Margaret Brennan to discuss recent migrant deaths in the U.S. and talk of impeachment in the House.

Missed the second half of the show? Senator Ron Johnson discusses the complications surrounding impeachment. Senator Jon Tester discusses issues concerning his home state of Montana. A panel of experts discuss Beto O'Rourke's odds for the democratic nomination.

Members of Congress are calling for action after Robert Mueller spoke about the Russia investigation for the first time. Some Democrats are asking for impeachment, while some Republicans said its time to move on. Nancy Cordes has the latest.