Democratic presidential candidate Julian Castro announced his withdrawal from this year's campaign, possibly due to financial ineligibility.

"With deep gratitude to all our supporters, I announce the end of the presidential campaign today," Castro posted on Twitter. "I am very proud of all the work we have done together. I will continue to fight for an America where everyone is concerned. I hope you will join me in that fight." .

Castro, 45, former Minister of Housing and Urban Development, is the only Latin American of the presidential race in 2020. He is the grandson of a Mexican immigrant and mayor of San Antonio, Texas from 2009 to 2014.

Castro was once considered a rising star in the Democratic Party under President Barack Obama. In October, he announced to supporters that he would give up without raising $ 800,000 by the end of the month. He continued his race to the White House by meeting his goals but was ineligible for Democratic presidential debates in November and December.

Castro has repeatedly opposed the tough immigration policy of President Donald Trump. He also criticized the Obama administration for its record high levels of immigration deportation to challenge former Vice President Joe Biden, one of the Democratic opponents in this year's campaign.

Castro first gained political attention at the 2012 Democratic National Convention when he was the first Latin American to make a keynote and was immediately compared to Obama. He was predicted to appear in a joint venture with former Secretary of State Hillary Clinton during the 2016 campaign, but Mrs. Clinton ultimately did not choose him.

Castro's campaign also faces financial difficulties and is forced to close operations in early voting states such as New Hampshire and South Carolina. Although Castro raised $ 3.5 million in the third quarter of this year, he reported receiving only $ 672,000 in cash by the end of September.