Congressional Republicans intend to use the budget reconciliation process to fund President-elect Donald J. Trump’s second-term agenda within 100 days of his inauguration. With control of both the House and Senate, Republicans might achieve that goal, but there are obstacles. They must first agree on both the process for considering the legislation and its substance, then pass it quickly. The entire Trump agenda is at stake because it depends on immediate action, given the looming midterm elections and Trump’s own term limit. If Congress cannot provide the funds for Trump’s initiatives within the next few months, experts say the president may struggle to get much done in his second term….