In his first political event in a state he lost in 2020, Biden is expected to take aim at Florida Republican governor DeSantis during a campaign event for Democratic candidate for governor Charlie Crist, and then attend a fundraiser.

The president will also go after Florida Republican senator Rick Scott, who has proposed to “sunset” Social Security and Medicare if the US Congress does not pass new legislation to extend them, according to a White House official.

The president is expected to offer his most sharply targeted attack yet on DeSantis, administration officials told Reuters. Biden and DeSantis have clashed over multiple issues including Covid-19 vaccines, abortion and LGBT rights.

Biden met DeSantis last month during a trip to the state to assess devastation from Hurricane Ian. They greeted each other warmly and stood shoulder to shoulder as they met with victims of the hurricane.

A lot has changed since today’s trip had to be rescheduled from late September due to the hurricane. In recent weeks, the White House has lowered its earlier optimism about the midterm elections and administration officials say they are now worried Democrats could lose control of both chambers of Congress.

Recent polls have shown Democrats, who once had comfortable leads in some Senate races, on a knife’s edge. Senate elections that were considered toss-ups between the two parties are now leaning Republican as high inflation persists.

Losing control of one or both houses of Congress would profoundly shape the next two years of Joe Biden’s presidency, with Republicans expected to block legislation on family leave, abortion, policing and other Biden priorities.

The last time a Democrat won a presidential or senate election in Florida was 2012, with Republicans holding an advantage in registered voters in the state, 5.2 million versus 4.9 million. But unaffiliated voters stands at 3.9 million and represent an increasingly important part of the electorate.