there for us in L.A. Now to the race for 2020 and some drama on the stage. As democratic candidates and party leaders spoke about their priority issues at a major event in California. ABC's white house correspondent Tara Palmeri is on the north lawn this morning with that story. Tara, good morning. Reporter: Good morning, Tom and Eva. 14 democratic candidates were pounding the pavement this weekend in California. What's become a critical state for Democrats who want to clinch the nomination because they moved up the primary. Now, the crowd was mainly Progressive. They were literally shouting for impeachment. But our recent polling shows very little overall public support for impeachment. Until now, many 2020 presidential hopefuls drawing the line at impeachment. But overnight, some taking a stand at the California democratic party conference, separating from the pack at the largest gathering of 2020 candidates before the democratic debates. We need to begin impeachment inquiries so that we have more legal leverage to get from this administration what we need to investigate where it leads. We need to begin impeachment proceedings and we need a new commander in chief. Zbrr shouts drowning out house speaker Pelosi's speech in her hometown of San Francisco. -- By the president of the United States. This is like coming home for me. Reporter: Pelosi, under pressure to act. More than 50 house Democrats now support impeachment hearings following special counsel Robert Mueller's statement that he didn't clear the president on obstruction of justice. Candidates also taking stand on gun control after that mass shooting in Virginia Beach. We're not secure if the second amendment is allowed to become a death sentence for thousands of Americans because Washington can't deliver commonsense gun reform. Reporter: Floating their ideas for gun reform. Those weapons belong on battlefields, not in our churches and not in our schools. Reporter: Then this shocking moment -- an animal rights activist walking on stage, snatching the microphone out of kamala's hand. Joe Biden was noticeably absent from that event. He skipped California for another battleground state, Ohio, where he hosted a lgbtq dinner. At that dinner, he called president trump a disaster on human rights. All right, Tara, thanks so much. Let's bring in George Stephanopoulos. George, good morning. I want to start with the news this weekend. 12 people killed in Virginia Beach. Police say he had a silencer. Do you see this emerging as major campaign issue in 2020? Well, it did become a pretty big campaign issue in the 2018 elections. More candidates elected in the 2018 midterms who were supporting tougher restrictions on guns. You've got some of the Democrats now calling for quite far-reaching proposals, including Cory booker calling for gun registration. Eric salwell calling for gun buybacks. You see that opposition, led by the NRA. The Republicans control the senate. This has been peril for Democrats in the past. Lot of this will depend on whether young people, especially, are energized to come out in massive issues because of this issue. I want to go back to some of the images we saw in Tara's piece. Speaker Nancy Pelosi at that state convention in California, interrupted by chants of "Impeach, impeach." As Tara pointed out, a poll shows the country doesn't want it right now. We heard what some Democrats and that activist base are saying. It sounds like some of the candidates are coming around to it. Listen closely to what they're saying. They're saying, we should start impeachment inquiries and that's where the pressure is on Nancy Pelosi right now, including from members of her own caucus and her own committee chairman. We have to think about opening up a formal inquiry to increase the Democrats' power against the white house, leverage against the white house and put a focus on what they think are high crimes and misdemeanors outlined in Robert Mueller's report. George has a big show this morning. We'll have the latest from Virginia Beach and he'll break down the 2020 race with presidential candidate Michael Bennet. Plus the powerhouse ronaldtable. All coming up on "This week" right here on ABC.