WASHINGTON, July 31 (Reuters) - More than 100 venture

capitalists including enterpreneur Mark Cuban and LinkedIn

founder Reid Hoffman threw their support behind U.S. Democratic

presidential candidate Kamala Harris on Wednesday, in a

counterweight to tech billionaires backing Republican rival

Donald Trump.

"We spend our days looking for, investing in and supporting

entrepreneurs who are building the future. We are pro-business,

pro-American dream, pro-entrepreneurship, and pro-technological

progress," the group said in a public petition posted online.

"We also believe in democracy as the backbone of our nation.

We believe that strong, trustworthy institutions are a feature,

not a bug, and that our industry - and every other industry -

would collapse without them."

Investor Chris Sacca, Katie Stanton of Moxxie, Eva Ho of

Fika Ventures and Rebecca Kaden of Union Square Ventures, were

among those who signed the letter and pledged to vote for Harris

in the Nov. 5 election.

The letter comes after Trump drew support from other

wealthy, high-profile Silicon Valley venture capitalists and

investors.

Elon Musk, the billionaire CEO of Tesla, publicly endorsed

Trump for the first time after the July 13 assassination attempt

on the former U.S. president.

Entrepreneur and investor David Sacks, the former chief

operating officer of PayPal ( PYPL ) and a close friend of Musk, has also

hosted fundraisers for Trump.