Some retcons to what I posted earlier:
The economy isn't "sluggish", but it's not as good as it was OTL
Bosnia was fought by Bush the same way Iraq was - with a huge mutinational coalition. At least, that was the plan. France and Germany refused support entirely, and Russia simply wound up madder at the US. In the end, Bosnia was not as succesful as Kuwait, and Milosevic would use this to cement his hold on power.
Gephardt is now Kerrey's Veep, not Harkin
Now then, 1997-2009:
Kerrey's platform going in had been less focus on foreign affairs and more focus on domestic affairs. The opposite platform had nearly cost Bush 1992, and had cost Quayle 1996. Kerrey's resolve would immediately be put to the test when an office building in Oklahoma City was bombed by a man named Timothy McVeigh, in response to President Bush's response to the Waco compound. Kerrey's heartfelt response to the disaster won over many people.
Kerrey's main foreign affairs event was his scaling down of forces abroad.. He didn't completely remove troops from Europe and Asia, but several forces were moved back to the states. Kerrey also continued Bush's platform of humanitarian aid in Somalia, refusing to allow the US to choose sides in the warlod conflict.
The primary highlight of Kerrey's first term was the Universal Health Care Act of 1998, passed before the mid-term elections could upset the Democratic hold on Congress. The midterms came and went, with the GOP picking up a few seats, but the Democrats maintaining a majority in both houses. Kerrey used this as a mandate to lower immigration restrictions, though he refuse several key Democrats' advice to form a Free Trade Zone between the US, Canada, and Mexico.
In 2000 Kerrey won the nomination handily, his only serious competitor being Bill Bradley. Gephardt was retained as running mate. In the Republican camp, the choices came down to either either former VP and Presidential candidate Dan Quayle or Senator John McCain. It was a hard fight, but McCain ultimately came out on top. He chose Lamar Alexander as runnig mate.
The battle between Kerrey/Gephardt and McCain/Alexander was frought with controversy and bitterness. In the end, Kerrey was able to squeak through a victory, though without a majority in the popular vote. Kerrey used this victory to continue his domestic programs. Then the terrorist attacks occurred.
The exact details are different from OTL, but terrorist attacks do occur in late 2001. Kerrey, who had built his presidency on an isolationist platform, was now caught between a rock - letting this attack go unpunished - and a hard place - violiting the very principles he had been elected on. Few men would envy him. In the end, Kerrey bowed to public opinion and commited forces to Afganistan to hunt for Osama. However, Kerrey upset several Republicans when he refused to depose the Taliban. Afganistan quickly went south, and Kerrey's support went with it. The 2002 elections turned both houses over to the GOP, who promptly cut Kerrey's health care and immigration programs down to size, witht he result being Kerrey using his veto power more from 2003-2005 than he had throughout the rest of his presidency.
In 2004, VP Gephardt suffered numerous challenges from men like Howard Dean, John Kerry, and Wesley Clark. Gephardt managed to squeak through a victory only in the final days of the primary, choosing Senator John Edwards of South Carolina as his running mate. The Republicans ultimately chose George Walker Bush, son of President George HW Bush, with John Engler as his running mate. Bush/Engler ultimately beat Gephardt/Edwards.
Bush's first action upon entering the white House was to reform the OOB in Afganistan. The succeses soon seen, like the overthrow of the Taliban and the destruction of several Al-Qaeda bases, were quickly tempered when Bush tried to drum up support for an invasion of Iraq. Bush finally got his war in 2006. However, the fact that war didn't go exactly as planned, combined with an increasingly weak economy, saw a strong Democratic challenge in 2008.
The Democrats in 2008 recovered from 2004 by selecting Governor Mark Warner of Virginia as candidate. His running mate was Evan Bayh of Indiana. Bush put up a strong fight, but the mortgage crisis ultimately doomed his campaign. Warner won a close election, and will be inaugurated the 44th president.