Political Analyst: Despite endorsement Clinton's lead expected to shrink

EAU CLAIRE, Wis. (WEAU) -- Now that Bernie Sanders announced his support of presidential hopeful, Hillary Clinton, the question is how the move will impact Donald Trump's campaign.

NBC polls show Clinton’s lead over Trump has narrowed to three points this week.

“She needs to attract the younger voters, and he's had great impact on the younger voters,” said Bernie support Charles Serros from Eau Claire.

Other Sanders supporters are skeptical of how it will help Hillary’s campaign.

“I don't think it will win over Sanders supporters. I think most of them are pretty dead set against her,” said Katie Bushman from Tilden.

Kate Bassing from Minnesota added, “I think it's really sad he didn't get the bid but I think he had to do what was necessary and support the person that did.”

WEAU political analyst John Frank says since both Trump and Sanders are political outsiders the announcement may hurt Trump's campaign.

“This year being an outsider is better than being an insider,” said Frank. “Had Bernie had not endorsed Hillary there is a theoretical possibility some of the people that supported him would support Donald Trump, even though the ideology is significant different. This endorsement makes that less likely.”

However, Frank says it is still likely the race will get closer as the months tick down to the election.

"A candidate that gets out to a huge lead in June or July that usually narrows significantly in August, September and October," Frank said.

Frank says with the Republican National Convention right around the corner thoughts are now turning to vice presidential nominations.

He explained, “In a country that is a diverse as the United States, choosing a vice president is all about balance. If you have been fortunate enough to get your nomination as an outsider of your party or an outsider of Washington, you probably want to bring an insider on.”

Frank says Sen. Elizabeth Warren and Labor Secretary Tom Perez are on Clinton’s shortlist to be vice president along with Virginia Sen. Tim Kaine

On the Republican side, Trump could use a conservative, like former house speaker Newt Gingrich.

Chris Christie is also reportedly being considered.

The Republican National Convention will be held in Cleveland, Ohio at the Quicken Loans Arena July 18-21, 2016.