I can think of a couple of reasons. First, congressmen represent their state and the people of that state. The president does not. He is essential an employee hired to manage the government. For the federal government to tell the states who they can elect to represent them seems a little more than just heavy handed.Then the president should not have term limits either...
Untrue. The president is not our representative, and he needs to have checks in his power.
The president is the representative of the entire nation, while Congresspeople represent their states.
There are already checks on presidential power. Congress and the Supreme Court are there as checks on the President.
If I like my president, and I like what he has done for my country, what right do you have to tell me I have to give him up?
Because he needs that check on his power.
Why does the president need the check of term limits but other elected officials do not?
Secondly, we expect our congressmen to represent us, not lobbyist, legislative staff, and bureaucrats. The less time they spend in congress, the less they will know and the more they will rely on these people. Committees that serve as watchdogs over the administration would be staffed with less experienced and knowledgeable members and become depend on the people they are suppose to be monitoring.
Who said the federal government must create term limits for Congress? It could be a constitutional amendment or simply something decided on a state by state basis.
The president represents the entire country. I'm not sure where this idea that we have a representative government with Congress, but not the president, comes from. Yes, it's a different kind of representation, but so is a Congressperson and a governor, and many states have gubernatorial term limits.
I'm not sure how the Congress we have, which clearly is seen as representing lobbyists, legislative staff, and bureaucrats by many people, would be worse off in that regard with term limits. It seems to me it would be harder for the outside influences to work on the representatives because they would have less time to do so, and because the representatives would have fewer elections to worry about.
Experience is certainly an issue, but term limits do not have to be for a short period. There's no reason the term limit couldn't be 3 or 4 terms. Having the same Congressperson in office for 30+ years, often running unopposed, doesn't seem particularly representative to me.
Term limits are not some sort of magic wand to fix the problems in government, but the current system doesn't seem to be working all that well. Term limits have worked well enough for other offices, I don't think it would cause insurmountable problems to have them for Congress.