Most of the founding generation was largely removed from active politics by the war of 1812. But of those I know of still active in politics, they seemed to follow much of the rest of the United States and often divide along sectional and political lines.

"Light-Horse Harry" Lee probably has the most tragic tale. As a Federalist, he was sympathetic to the opposition in Baltimore, a city that had been hit hard by British actions prior to the war. Lee took a small band of men to a Federalist printing press in order to protect it from roving pro-war mobs that were plaguing Baltimore. Tensions heightened until a member of the mob was shot by the Federalists, in an attempt to defuse the situation Lee and his men surrendered into the care of city officials. However, later that night city officials and an unsympathetic militia were unable to calm the mob and they stormed the jail where Lee was being held. He was nearly beaten to death and his comrade, General James Lingan (himself a hero of the revolution) was killed screaming on the streets of Baltimore. Lee never fully recovered from his wounds and died a few years later. The riots shocked President James Madison, but he was unwilling to take any hard actions to stop them.

Rufus King, a New York Federalist opposed the war but like many middle state Federalists was unwilling to take the drastic steps of New England Federalists. After the British went on the offensive in 1814 he generally supported administrative policies in the defense of the United States. In Contrast Timothy Pickering, a Massachusetts Federalist was a constant thorn in the side of the Virginia Dynasty ever since the fall of the Federalists in the election of 1800. Pickering had tried to nurture a New England secession movement for years and worked with the British government to try and drive the Republicans from power.Like many New England Federalists his reputation was tarnished for years because of his opposition to the war.

Elbridge Gerry is an illuminating case. Almost universally well liked initially by both parties, the increasing bitterness and partisanship in Massachusetts drove him to the Republican faction where he became an extremely partisan governor. Deeply distrustful of Federalists he approved new electoral districts that were heavily partisan and became the basis of the term "Gerrymandering". Removed from office in 1812, his Federalist replacement would secretly negotiate with British forces in Canada for a separate New England peace. Gerry would briefly be Madison's VP before dying, in that short time he continued to be supportive of the War and distrustful of the Federalists. Interestingly after his death in 1814 Madison went the remainder of his term without a VP.

Broadly speaking, the Southern founding fathers I know of still engaged in politics Nathaniel Macon, James Madison, and James Monroe were all supportive of the war. However all three had attempted to avoid war, and saw the declaration of war as a last resort. This stands in sharp contrast to the War Hawks like Henry Clay and John C. Calhoun. young congressmen largely from the South& West who had brazenly called for war. It also stands in contrast to the John Randolph of Roanoke and the rest of the quids, archconservatives who were adamantly opposed to the war. Nathaniel Macon was similar politically to Randolph in many regards but supported declaring war, however he continued to oppose many of the nationalist policies that were advocated to support the war and strengthen the American Economy.

Of those who were retired from political life, I know little off the top of my head. Jefferson would frequently write to Madison with military advice. The advice was often quite bad especially in naval matters where Jefferson continued to advocate for coastal gunboats and concentrating the few heavy ships in one port. When responding Madison tended to take a kind tone, and would point out why these policies were unsound. There were also some talks of Jefferson coming back to Washington to assume the secretary of state position but Madison abandoned the idea as politically unfeasible.