WASHINGTON (AP) – Ed Gillespie, a high-dollar Washington lobbyist and long-time go-to guy for President Bush and the Republican Party, is replacing Dan Bartlett as White House counselor in the president’s inner circle, according to a senior administration official.

The president is having lunch Wednesday with Messrs. Gillespie and Bartlett and making the announcement afterward, said the official, who requested anonymity because Mr. Bush had not yet talked.

Mr. Gillespie, a former head of the national GOP, will take on Mr. Bartlett’s same duties and title as a senior presidential adviser, the official said. He starts June 27, in order to have some overlap with Bartlett, who is leaving around July 4.

Mr. Bartlett, 36, has been one of Bush’s most trusted advisers, a constant member of the president’s inner circle, and is his longest-serving aide. He announced his resignation on June 1 to begin a career outside of government.

Mr. Bartlett had been with Mr. Bush for nearly 14 years, from Mr. Bush’s first campaign as governor of Texas, through two races for the White House and more than six years of a presidency marked by costly wars in Iraq and Afghanistan and an ongoing battle against terrorism.

As counselor to the president, Mr. Bartlett has been at the center of White House decisionmaking, stepping into the public eye in times of trouble to defend Mr. Bush on everything from the unpopular war in Iraq to the government’s bungled response to Hurricane Katrina and the Republicans’ loss of Congress.

Mr. Gillespie has been a high-profile Washington lobbyist for years, joining forces with former Clinton administration counsel Jack Quinn to form Quinn Gillespie & Associates. He also is now the chairman of the Virginia Republican Party.

As a former Republican National Committee chairman whom the president has long trusted, Mr. Gillespie’s name has surfaced nearly every time there was a significant opening looming in the Bush White House. When it seemed political guru Karl Rove might be forced out because of the CIA leak investigation, for instance, Mr. Gillespie was speculated to be one choice as a possible replacement. Same for when former chief of staff Andrew Card was leaving.

Mr. Gillespie, funny and well-liked by reporters, has played many roles for Mr. Bush, in addition to leading the party during the 2004 elections that sent Mr. Bush back to the White House and retained GOP majorities in the House and Senate.

He was a senior communications adviser to Mr. Bush’s first campaign for president, spokesman during the 2000 recount in Florida and communications director for the 2001 inaugural. He was tapped to lead the confirmation efforts for Chief Justice John Roberts to the Supreme Court and later advised Samuel Alito during his confirmation process as well.

When Mr. Gillespie left as head of the GOP in November 2004, Mr. Bush heaped praise on him.

“He helped bring many new people to our cause by sharing our vision of a safer world and a more hopeful America,” the president said in a statement. “His successful efforts in outreach, registration and voter turnout will be an enduring legacy on which to build a long-lasting governing coalition.”

Mr. Gillespie was a campaign adviser to Sen. George Allen’s failed re-election bid in Virginia last year. In the win column, he was a strategist for Elizabeth Dole’s successful Senate campaign in North Carolina in 2002.

As a top aide to former House Majority Leader Dick Armey, Republican of Texas, Mr. Gillespie was a principal drafter of the “Contract with America,” the 1994 GOP platform that gets credit for helping Republicans capture control of Congress that year after 40 years of Democratic rule.

He was thought to have ambitions to run for office in Virgina.

The son of a large middle-class Irish family in New Jersey, Gillespie and his wife, Cathy, have three children.

Mr. Gillespie was listed as lobbyist last year for dozens of clients, including such corporate giants as Microsoft, Verizon Wireless, AT&T, pharmaceutical manufacturer Bristol-Myers Squibb, Tyson Foods, the Safeway grocery store chain, the Entergy energy company, the Bank of America, the Diageo liquor company and NBC Universal, lobbying reports on file with the Senate show.