Dem senator: 'A lot of angst' over who leads the party

Sen. Claire McCaskillClaire Conner McCaskillHow Citizens United altered America's political landscape #MidnightMoscowMitch trends amid criticism of McConnell's proposed impeachment trial rules The most expensive congressional races of the last decade MORE (D-Mo.) said on Sunday that the Democratic Party has struggled to put forth a clear leader because so many people in the party "are trying to position themselves to run for president."

"I think it's hard when we are the minority party that we have lots of folks that are leaders and want to be leaders," she told NBC's "Meet the Press." "We have so many people that are trying to position themselves to run for president, I think it's hard to say who is the leader, and there's a lot of angst about that."

"I frankly don't worry about any of that," she added. "That's not something that concerns me right now."

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Speculation has swirled around a number of Democrats regarding potential runs for the White House in 2020. Among those named have been Sens. Elizabeth WarrenElizabeth Ann WarrenKlobuchar plans campaign rallies across Iowa despite impeachment trial Hillicon Valley — Presented by Philip Morris International — Wyden asks NSA to investigate White House cybersecurity | Commerce withdraws Huawei rule after Pentagon objects | Warren calls on Brazil to drop Greenwald charges Warren pledges to release Trump records if elected MORE (Mass.) and Kamala HarrisKamala Devi HarrisHarris on 2020 endorsement: 'I am not thinking about it right now' Panel: Is Kamala Harris a hypocrite for mulling a Joe Biden endorsement? The Hill's Morning Report — Dems detail case to remove Trump for abuse of power MORE (Calif.), as well as former Vice President Joe BidenJoe BidenSchiff closes Democrats' impeachment arguments with emotional appeal to remove Trump Conservative reporter on Sanders: He's not a 'yes man' Democrats feel political momentum swinging to them on impeachment MORE.

Sen. Bernie SandersBernie SandersSanders to Clinton: 'This is not the kind of rhetoric that we need' Conservative reporter on Sanders: He's not a 'yes man' Human Rights Campaign president rips Sanders's embrace of Rogan endorsement MORE (I-Vt.), while not a member of the Democratic Party, sought its nomination last year and has been suggested as a possible candidate in 2020.

At the same time, some Democrats, like Rep. Seth Moulton (Mass), have questioned the party's current leaders, particularly House Minority Leader Nancy Pelosi (Calif.), and have called to replace the leadership.